Persecutory Delusions : Symptoms, Causes, Diagnosis, and Treatment

What Are Persecutory Delusions? Symptoms, Causes, Diagnosis, and Treatment

Persecutory delusions are fixed false beliefs that someone, some group, or some organization is deliberately trying to harm, spy on, harass, sabotage, poison, control, cheat, mock, or persecute a person. The belief is not simply ordinary fear, stress, distrust, or overthinking. It is held with strong conviction, resists clear counter-evidence, and begins to shape the person’s daily life, relationships, decisions, and sense of safety.

A person with persecutory delusions may believe that neighbors are watching them, coworkers are conspiring to ruin their career, strangers are following them, their phone is being hacked, food is being poisoned, or a hidden organization is trying to destroy their life. The exact story can vary widely, but the core structure stays the same: “Someone is intentionally trying to harm me.”

Quick Summary

Persecutory delusions are a type of delusion centered on the belief that harm is being done, planned, or intentionally directed toward the person or someone close to them.

They can appear in several conditions, including schizophrenia, schizoaffective disorder, delusional disorder persecutory type, bipolar disorder with psychotic features, major depression with psychotic features, substance-induced psychosis, and psychosis due to medical or neurological conditions.

The main signs are strong conviction, intense fear, repeated checking, avoidance, suspicious interpretation of neutral events, and difficulty accepting alternative explanations even when evidence is presented.

This article explains the symptom, how it differs from ordinary paranoia, what causes it, how clinicians think about diagnosis, and what treatment or support may help.

Table of Contents

Part 1: Understanding Persecutory Delusions

1. What Are Persecutory Delusions?
2. Simple Definition
3. Why It Is Not Just Paranoia or Overthinking
4. The Paranoia Spectrum: From Suspicion to Delusion
5. Common Real-Life Themes
6. Conditions Linked to Persecutory Delusions
7. Why the Belief Feels So Real

Part 2: Symptoms, Examples, and Daily-Life Impact

8. Core Symptoms of Persecutory Delusions
9. The Belief → Emotion → Behavior Cycle
10. Real-Life Examples of Persecutory Delusions
11. Checking, Avoidance, and Safety Behaviors
12. Digital Persecution Beliefs: Phone Hacking, Tracking, and Online Surveillance
13. Impact on Work, Family, Relationships, and Social Life
14. Risk Warning Signs

Part 3: Causes, Brain Mechanisms, and Diagnosis

15. Causes and Risk Factors
16. Dopamine and Aberrant Salience
17. Predictive Coding and Threat Beliefs
18. Trauma, Low Self-Esteem, Worry, and Social Defeat
19. Substance-Induced and Medical Causes
20. Diagnostic Context: Schizophrenia, Delusional Disorder, Mood Disorders, and More
21. Differential Diagnosis: PTSD, OCD, Paranoid Personality, and Real-Life Threats

Part 4: Treatment, Support, FAQ, and References

22. Treatment and Management
23. Medication and Clinical Assessment
24. CBT for Psychosis and Psychological Therapy
25. How Family and Friends Can Help
26. What Not to Say to Someone with Persecutory Delusions
27. When to Seek Professional or Emergency Help
28. Frequently Asked Questions
29. References

1. What Are Persecutory Delusions?

Persecutory delusions are false, fixed beliefs in which the central theme is being harmed, harassed, watched, mocked, cheated, conspired against, poisoned, sabotaged, or persecuted. In plain language, the person believes that an external person, group, system, or organization is intentionally trying to damage their body, reputation, career, relationships, privacy, safety, or life.

This belief is different from simply being cautious. Everyone can feel suspicious sometimes. A person may distrust a stranger, feel uncomfortable after a conflict, or worry that someone dislikes them. Those reactions can happen in ordinary life. A persecutory delusion is different because the belief becomes rigid, highly certain, emotionally overwhelming, and difficult to change even when there is no convincing evidence.

In the ICD-11, persecutory delusion is described as a delusion whose main theme is that the person, or someone close to them, is being attacked, mocked, harassed, cheated, conspired against, or persecuted. That detail matters because persecutory delusions are not limited to fear for oneself. Some people may believe that a partner, child, parent, close friend, or loved one is also being targeted.

The key word is intentional. The person does not merely think something bad might happen by chance. They believe someone is doing it on purpose. A random noise becomes a sign of surveillance. A neighbor’s glance becomes evidence of being watched. A delayed message becomes proof of secret interference. A technical problem becomes “they hacked my device.” The world begins to look like a map of hidden threats.

Core Idea

Persecutory delusion = “I am being intentionally harmed or targeted” + “there is a person, group, or system behind it.”

2. Simple Definition

A simple definition of persecutory delusions is this:

Persecutory delusions are fixed false beliefs that someone is deliberately trying to harm, spy on, threaten, sabotage, poison, control, or persecute the person, despite a lack of reliable evidence.

This definition contains several important parts. First, the belief is fixed, meaning it does not shift easily. Second, it is false or unsupported by reliable evidence. Third, the belief centers on harm. Fourth, the person usually believes there is a persecutor, such as a neighbor, coworker, family member, online group, government agency, company, gang, stranger, or unknown organization.

The belief may sound realistic in some cases and bizarre in others. For example, believing that coworkers are secretly trying to get someone fired is at least possible in the real world, even if there is no evidence in that specific case. Believing that invisible machines are controlling the brain from another dimension would be much less realistic. Both can still be persecutory if the central theme is intentional harm by an outside force.

Clinically, the exact content is less important than the structure. The story may involve neighbors, cameras, poison, hacked phones, gossip, police, spies, social media, secret codes, or hidden devices. The structure underneath is the same: “They are doing something to hurt me.”

3. Why It Is Not Just Paranoia or Overthinking

Many people use the word “paranoid” casually. Someone might say, “I’m paranoid my boss dislikes me,” or “I’m paranoid someone read my message.” In everyday speech, paranoia often means worry, suspicion, social anxiety, insecurity, or fear of being judged. That is not the same as a delusion.

Ordinary suspicion usually leaves some room for doubt. A person might think, “Maybe they were laughing at me, but maybe not.” They may feel anxious, but they can still consider other explanations. They may accept reassurance if the evidence is clear enough. In persecutory delusions, this flexibility shrinks or disappears.

The person may become completely convinced that their interpretation is true. If others disagree, the disagreement itself may be pulled into the delusional explanation. For example, if family members say, “There is no camera in the room,” the person may respond, “You are helping them hide it.” If the police or doctor does not confirm the belief, the person may interpret that as proof that the system is also involved.

This is why persecutory delusions can become so distressing and difficult to address. The belief is not sitting quietly in the corner of the mind. It becomes a central operating system. The person may start making decisions around it: avoiding places, cutting off relationships, recording conversations, changing locks, checking devices repeatedly, or staying awake at night to monitor danger.

Important Difference

Ordinary overthinking usually says: “What if this is true?”

Persecutory delusion says: “This is definitely true, and all evidence must be interpreted through it.”

4. The Paranoia Spectrum: From Suspicion to Delusion

Persecutory delusions can be understood as the severe end of a broader paranoia spectrum. At one end, there is normal caution. Humans are built to detect danger. If someone has been betrayed, bullied, stalked, scammed, or threatened before, they may naturally become more watchful. This does not automatically mean psychosis.

In the middle of the spectrum, a person may have paranoid thoughts or paranoid ideation. This can involve feeling that others are judging, excluding, mocking, or treating them unfairly. These thoughts can be distressing, but they are not always held with full delusional intensity. The person may still question them, discuss them, and adjust their view when new evidence appears.

At the severe end, persecutory delusions appear. The belief becomes strongly held, difficult to correct, and organized around intentional threat. The person may feel certain that someone is following them, spying on them, poisoning them, sabotaging their work, spreading rumors, hacking their phone, or planning an attack. Neutral events no longer look neutral. They become clues.

Level	What It May Look Like	Reality Testing
Ordinary caution	Being careful, not trusting people too quickly, checking facts before believing someone.	Mostly intact. The person can update their view.
Paranoid ideation	Feeling judged, watched, laughed at, excluded, or treated unfairly, but not always with full certainty.	Partly intact. Doubt may still be possible.
Persecutory delusion	Firm belief that a person, group, or system is intentionally trying to harm, spy on, poison, control, or sabotage them.	Severely impaired. Contradictory evidence may be reinterpreted as part of the plot.

This distinction is important because not every suspicious thought is a psychotic symptom. The concern rises when suspicion becomes fixed, extreme, distressing, unsupported by evidence, and powerful enough to disrupt work, sleep, relationships, safety, or basic daily functioning.

5. Common Real-Life Themes

Persecutory delusions can take many forms. The content often reflects the person’s life, culture, technology, fears, past experiences, and social environment. In earlier decades, someone might have believed that a landline phone was tapped or that neighbors were watching through the window. Today, the same underlying symptom may involve hacked phones, spyware, hidden cameras, artificial intelligence, online harassment, or social media posts that seem coded against the person.

The surface changes with the era. The emotional engine stays the same.

Belief of Being Watched or Spied On

One common theme is surveillance. A person may believe that neighbors have installed hidden cameras, strangers are following them, people in cars are monitoring their movements, or devices in the home are recording everything. They may inspect walls, ceilings, electrical outlets, mirrors, phones, laptops, or routers for signs of hidden surveillance.

Belief of Being Poisoned or Contaminated

Another theme is poisoning. The person may believe that food, water, medication, cosmetics, air vents, or household items have been contaminated on purpose. This can lead to food refusal, repeated checking, avoidance of meals prepared by others, or severe conflict with family members.

Belief of Workplace Sabotage

In workplace persecution beliefs, the person may believe that coworkers, supervisors, or human resources are secretly working together to damage their reputation, block promotions, manipulate documents, get them fired, or make them look incompetent. Ordinary workplace tension may be interpreted as organized sabotage.

Belief of Social or Online Targeting

Some persecutory delusions center on social media or online platforms. A person may believe that vague posts are coded messages about them, that strangers online are coordinating attacks, that their account is being monitored, or that ordinary algorithmic content is part of a targeted campaign.

Belief of Organized Conspiracy

In more elaborate cases, the person may believe that a secret group, gang, government agency, company, cult, or unknown network is coordinating against them. The belief may expand over time until many unrelated events are absorbed into one large persecutory narrative.

The Common Pattern

Whether the story involves neighbors, coworkers, phones, cameras, poison, police, strangers, or online groups, the central pattern is the same: neutral or ambiguous events are interpreted as evidence of intentional harm.

6. Conditions Linked to Persecutory Delusions

Persecutory delusions are not one single disease by themselves. They are a type of delusion that can appear in different psychiatric, neurological, medical, or substance-related contexts. This is one reason diagnosis requires a full clinical assessment rather than judging from one belief alone.

Schizophrenia and Schizoaffective Disorder

In schizophrenia, persecutory delusions may occur alongside other psychotic symptoms, such as hearing voices, disorganized thinking, unusual behavior, reduced emotional expression, social withdrawal, or loss of motivation. In schizoaffective disorder, psychotic symptoms occur together with significant mood episodes, such as depression or mania.

Delusional Disorder, Persecutory Type

In delusional disorder, persecutory type, the person may appear relatively organized in many areas of life, but one fixed delusional belief becomes dominant. For example, they may function normally in some settings while remaining deeply convinced that a neighbor, coworker, institution, or group is targeting them.

A useful caution is that diagnostic systems do not always frame duration in exactly the same way. DSM-style descriptions commonly use a minimum of one month for delusional disorder, while ICD-11 describes delusional disorder as involving a delusion or related delusions typically persisting for at least three months and often much longer. The main point is that duration, context, other symptoms, mood episodes, substance use, and medical causes all matter.

Mood Disorders with Psychotic Features

Persecutory delusions can also appear during severe mood episodes. In major depression with psychotic features, the content may be colored by guilt, worthlessness, shame, or hopelessness. A person may believe that others want to punish or eliminate them because they are bad, guilty, or worthless. In bipolar mania with psychotic features, the content may involve power, status, enemies, or being targeted because of special importance.

Substance-Induced Psychosis

Certain substances can trigger or worsen psychosis, especially in vulnerable people. Stimulants such as amphetamines or cocaine are well known for producing paranoia and persecutory beliefs. Cannabis, particularly high-THC use, can also increase risk in some individuals. Alcohol withdrawal, hallucinogens, and other substances may contribute depending on the person and situation.

Medical or Neurological Conditions

Persecutory delusions may also appear in psychosis caused by medical or neurological conditions. Examples can include temporal lobe epilepsy, autoimmune encephalitis, dementia, Parkinson’s disease psychosis, brain tumors, metabolic problems, infections, endocrine disorders, medication effects, or other brain-related conditions. This is why sudden new psychotic symptoms, especially in later life or with confusion, seizures, fever, neurological signs, or rapid personality change, should be assessed medically.

Clinical Reminder

The same persecutory belief can appear in different conditions. Diagnosis depends on the full picture: timeline, mood symptoms, hallucinations, disorganized thinking, substance use, medical history, neurological signs, distress, risk, and functional impairment.

7. Why the Belief Feels So Real

From the outside, persecutory delusions may look irrational. From the inside, they can feel terrifyingly real. This is because the belief is not just an abstract idea. It is usually tied to strong emotion, bodily alarm, selective attention, memory, and repeated interpretation of events.

The brain is built to detect threat. When that system becomes overactive or distorted, ordinary information can feel unusually meaningful. A car parked outside may not feel like “just a car.” It may feel loaded with significance. A stranger’s glance may not feel accidental. A technical glitch may not feel random. The mind then tries to explain why these things feel so important, and if the person is already anxious, isolated, traumatized, sleep-deprived, or vulnerable to psychosis, the explanation may become persecutory.

Over time, the belief can become self-reinforcing. The person scans for danger, finds ambiguous details, interprets them as proof, becomes more afraid, checks even more, and then finds more “evidence.” This loop can make the belief feel stronger with each repetition.

The more the person searches for signs of threat, the more ordinary life begins to look threatening.

This does not mean the person is choosing to be difficult. It also does not mean every fear they have should be dismissed without thought. Real stalking, abuse, discrimination, workplace bullying, and harassment do exist. The clinical question is whether the belief is supported by reliable evidence, whether alternative explanations can be considered, whether the belief has become fixed beyond correction, and whether it is causing serious distress or impairment.

A careful approach avoids two mistakes. The first mistake is instantly agreeing with the delusion and strengthening it. The second mistake is harshly arguing, mocking, or saying, “That’s ridiculous,” which often makes the person feel even more unsafe and misunderstood. A safer response focuses on the person’s fear, stress, sleep, safety, and willingness to get professional help, rather than trying to win a debate about every detail.

Part 1 Takeaway

Persecutory delusions are fixed false beliefs about being intentionally harmed, watched, sabotaged, poisoned, controlled, cheated, mocked, or persecuted. They are more severe than ordinary suspicion because they are held with high certainty, resist correction, and can dominate daily life.

They can appear in schizophrenia, schizoaffective disorder, delusional disorder persecutory type, mood disorders with psychotic features, substance-induced psychosis, and medical or neurological conditions.

In the next part, we will look closely at the symptoms, real-life examples, emotional distress, checking behaviors, avoidance, digital persecution beliefs, and how persecutory delusions affect work, relationships, and safety.

8. Core Symptoms of Persecutory Delusions

The core symptoms of persecutory delusions are not only found in what a person says. They also appear in how the person feels, behaves, explains events, uses technology, relates to others, and tries to protect themselves from perceived danger. The belief becomes a filter through which the world is interpreted.

At the center is a fixed belief that harm is being done, planned, or intentionally directed toward the person. The person may believe that someone is spying on them, poisoning them, sabotaging their career, damaging their reputation, following them, hacking their phone, reading their private messages, spreading rumors, or coordinating a larger plot against them. The belief may sound realistic on the surface, but the problem is the degree of certainty, the lack of reliable evidence, and the way the belief absorbs ordinary events into a threat-based story.

In everyday language, people often describe this as “paranoia,” but persecutory delusions are more severe than ordinary suspiciousness. The person is not merely wondering whether something might be wrong. They may feel sure that the threat is real, urgent, personal, and intentional.

The Main Symptom Pattern

Persecutory delusions usually involve four layers working together:

1. Belief: “Someone is trying to harm me.”

2. Emotion: fear, anxiety, anger, shame, panic, or helplessness.

3. Attention: scanning the environment for clues and threats.

4. Behavior: checking, avoiding, reporting, confronting, hiding, recording, or protecting oneself.

Once these layers lock together, the delusion can begin to run daily life like a hidden operating system.

Strong Conviction

A key symptom is strong conviction. The person may believe the persecutory idea with near-total certainty. They may say things like, “I know they are watching me,” “I know my coworkers are doing this,” or “I know my phone has been hacked,” even when the available evidence is weak, ambiguous, or explainable in other ways.

This conviction is not the same as stubbornness. From the person’s point of view, the belief does not feel like an opinion. It feels like reality. Their body reacts as if the threat is truly present. Their heart races, sleep becomes difficult, their attention narrows, and every uncertain detail starts to look meaningful.

Resistance to Counter-Evidence

Another core feature is that the belief does not soften easily when challenged. If a family member, doctor, friend, police officer, employer, or technical expert says there is no evidence of the threat, the person may not feel reassured. Instead, the denial may be interpreted as part of the danger.

For example, if a technician says there is no spyware on the phone, the person may believe the spyware is too advanced to detect. If a doctor says the symptoms are caused by anxiety or psychosis, the person may believe the doctor has been manipulated. If family members disagree, the person may believe the family has been deceived or recruited into the plot.

Threat-Based Interpretation of Neutral Events

Neutral or ambiguous events become signs of danger. A stranger looking briefly in their direction may become “surveillance.” A group laughing may become “they are laughing at me.” A delivery mistake may become “someone is testing me.” A car parked nearby may become “they are watching my house.” An internet slowdown may become “they are interfering with my connection.”

This is one reason persecutory delusions can grow. Life constantly produces ambiguous details. Most people ignore them or explain them casually. In persecutory delusions, those details are collected, connected, and converted into evidence.

Emotional Distress

Persecutory delusions are usually frightening. The person may feel trapped, watched, invaded, humiliated, powerless, or unsafe. They may live in a constant state of alarm, as if danger could arrive at any moment. This can cause insomnia, exhaustion, irritability, panic, anger, withdrawal, and despair.

The distress is not fake. Even if the belief is false, the fear can be intensely real. This distinction matters when trying to help. Arguing about the belief often fails, but acknowledging the distress can open a safer path to support.

9. The Belief → Emotion → Behavior Cycle

A useful way to understand persecutory delusions is through the cycle of belief, emotion, and behavior. The belief creates fear. The fear drives protective behaviors. The protective behaviors seem to confirm the belief. Then the belief grows stronger.

Belief: “They are targeting me.”
Emotion: “I am in danger.”
Behavior: “I must check, avoid, hide, record, escape, confront, or protect myself.”

This cycle is powerful because it gives the person a sense that their actions are keeping them alive or safe. For example, if they avoid going outside and nothing bad happens, the brain may not conclude, “Maybe there was no threat.” Instead, it may conclude, “Nothing happened because I stayed inside.” The safety behavior then becomes “proof” that the threat was real.

The same pattern can happen with checking. If the person checks the locks ten times and no one breaks in, they may believe the checking prevented danger. If they scan social media all night and find a vague post that could be interpreted as hostile, that post may become new evidence. If they record conversations and hear an unclear word, the unclear word may be taken as a hidden message.

Why Safety Behaviors Can Keep the Delusion Alive

Safety behaviors are actions meant to reduce danger, such as avoiding people, checking cameras, changing routes, searching for hidden devices, or keeping watch at night.

The problem is that when nothing happens, the person may think, “My precautions worked,” rather than, “Maybe the threat was not there.” This can accidentally strengthen the belief.

How the Cycle Expands

At first, the belief may focus on one person or one situation. Over time, it can expand. A conflict with one neighbor becomes “all the neighbors are involved.” A problem at work becomes “the whole company is against me.” One strange online comment becomes “there is a coordinated digital attack.” One medical symptom becomes “someone is poisoning me.”

The more the person explains life through the persecutory belief, the more difficult it becomes to separate coincidence, misunderstanding, stress, technical problems, ordinary social behavior, and real evidence. Everything starts to feed the same story.

10. Real-Life Examples of Persecutory Delusions

The examples below are not meant to mock or dramatize the condition. They show how persecutory delusions can appear in daily life. The content may vary, but the central pattern is the belief that harm is intentional, organized, and directed at the person.

Example 1: Believing Neighbors Are Watching or Recording Them

A person may believe that neighbors have installed cameras, microphones, or listening devices around the home. They may inspect walls, ceilings, windows, electrical outlets, smoke detectors, air conditioners, mirrors, or small cracks in furniture. They may cover windows, avoid speaking in certain rooms, whisper at home, or accuse neighbors of monitoring them.

Ordinary sounds such as footsteps, doors closing, cars parking, dogs barking, or people talking outside may be interpreted as signals that the surveillance is active. If neighbors deny it, the denial may be seen as further proof that they are hiding something.

Example 2: Believing Coworkers Are Sabotaging Their Career

In workplace-related persecutory delusions, a person may believe that coworkers, supervisors, or human resources are secretly trying to get them fired, ruin their reputation, steal their ideas, block promotions, or make them look unstable. A normal work email may be interpreted as a coded warning. A meeting without them may be seen as evidence of conspiracy. A delayed reply may feel like intentional exclusion.

The person may begin documenting every interaction, saving screenshots, recording conversations, repeatedly complaining to management, or avoiding colleagues. Work performance may decline, not because the person is lazy, but because so much mental energy is consumed by threat-monitoring.

Example 3: Believing Food or Water Is Being Poisoned

Some persecutory delusions involve poisoning or contamination. A person may believe that family members, restaurants, coworkers, neighbors, or unknown enemies are placing chemicals, drugs, toxins, or harmful substances in food or water. They may refuse to eat meals prepared by others, throw food away, smell or inspect everything, buy sealed products only, or stop taking prescribed medication because they believe it has been tampered with.

This can become medically risky if the person stops eating enough, becomes dehydrated, refuses necessary medicine, or loses significant weight. It can also create intense conflict with caregivers, partners, parents, or roommates who feel accused despite trying to help.

Example 4: Believing Strangers Are Following Them

A person may believe that strangers on the street, people in cars, shoppers in stores, or passengers on public transport are following them. They may change routes, avoid certain places, get off buses early, circle around blocks, or take photos of people they believe are involved.

The person may notice ordinary coincidences, such as seeing the same color car twice in one day, and interpret them as confirmation. A stranger glancing at them may feel like surveillance. A person walking behind them may feel like a follower. Over time, leaving the house can become exhausting or terrifying.

Example 5: Believing Online Posts Are Secretly About Them

Some persecutory beliefs involve social media. A person may believe that vague posts, memes, song lyrics, hashtags, comments, or status updates are hidden messages aimed at them. They may spend hours reviewing timelines, screenshots, likes, views, emojis, or posting times to prove that others are mocking or threatening them.

This can overlap with ideas of reference, where neutral public information feels personally directed at the person. When the content also includes intentional harm, humiliation, sabotage, or coordinated attack, it can become part of a persecutory delusional system.

Example 6: Believing Authorities or Organizations Are Targeting Them

In some cases, the perceived persecutor is not one person but an institution, company, secret group, government agency, intelligence service, religious group, criminal gang, or online network. The person may believe that documents are being manipulated, phones are tapped, bank accounts are monitored, police are ignoring reports on purpose, or doctors are hiding the truth.

These beliefs can become highly elaborate. The person may connect unrelated events across months or years into one large narrative. The more complex the story becomes, the harder it may be for loved ones to respond without accidentally arguing, validating, or escalating the situation.

Theme	Possible Belief	Common Behavior
Surveillance	“They installed cameras or microphones to watch me.”	Searching walls, covering windows, whispering, avoiding certain rooms.
Poisoning	“Someone is putting chemicals in my food or medicine.”	Refusing food, throwing meals away, avoiding medication, checking packaging.
Workplace sabotage	“My coworkers are plotting to ruin my career.”	Saving evidence, recording conversations, avoiding coworkers, repeated complaints.
Digital targeting	“My phone is hacked and people online are tracking me.”	Changing passwords repeatedly, deleting accounts, checking apps, scanning devices.
Organized conspiracy	“A secret group is coordinating against me.”	Reporting to authorities, confronting others, collecting clues, isolating.

11. Checking, Avoidance, and Safety Behaviors

The behaviors connected to persecutory delusions often make sense from the person’s point of view. If someone truly believes they are being watched, poisoned, followed, hacked, or sabotaged, then checking and avoiding feel logical. The tragedy is that these behaviors can shrink life dramatically and keep the fear alive.

Checking Behaviors

Checking behaviors may include repeatedly inspecting locks, doors, windows, cameras, phones, laptops, routers, closets, ceilings, food packaging, medication bottles, social media accounts, or bank activity. The person may search for hidden devices, review recordings, take screenshots, or compare small details across different days.

Checking may temporarily reduce fear, but the relief usually does not last. A new doubt appears. A new sound is noticed. A new post looks suspicious. A new technical glitch occurs. The checking starts again.

Avoidance Behaviors

Avoidance can include staying home, avoiding neighbors, avoiding coworkers, refusing public transport, avoiding restaurants, avoiding phone calls, refusing medical appointments, leaving jobs, cutting off friends, or avoiding family members believed to be involved.

Avoidance may feel protective in the short term, but over time it can increase isolation. The fewer safe relationships and normal routines a person has, the more room the persecutory belief has to grow without reality-based feedback.

Protective and Defensive Behaviors

Some people install extra locks, cameras, alarms, curtains, barriers, or tracking apps. Others change phone numbers, email accounts, passwords, addresses, jobs, routes, or daily schedules. Some may carry objects for protection, confront suspected persecutors, or repeatedly contact authorities.

These actions can create serious problems when they escalate. A person who feels cornered may act in ways that frighten others, damage relationships, create legal consequences, or increase risk to themselves and people around them.

Why This Can Become Dangerous

A person with persecutory delusions may feel like a victim under attack. If fear becomes extreme, they may believe they must “act first” to protect themselves.

This does not mean every person with persecutory delusions is violent. Most are more frightened than dangerous. But risk should be taken seriously when there are threats, weapons, severe agitation, suicidal thoughts, refusal of food or medication, or plans to confront someone.

12. Digital Persecution Beliefs: Phone Hacking, Tracking, and Online Surveillance

Modern persecutory delusions often involve technology. The theme is old, but the costume is new. In the past, a person might have believed that their landline was tapped or that neighbors were listening through walls. Today, the belief may involve hacked phones, spyware, hidden apps, cameras, microphones, GPS tracking, artificial intelligence, social media algorithms, cloud accounts, or online groups.

Because real hacking, data breaches, scams, cyberstalking, and privacy violations do exist, this area can be especially confusing. The question is not whether digital threats ever happen. They do. The clinical concern is whether the person’s belief is fixed, extreme, unsupported by reliable evidence, and spreading into many areas of life despite reasonable checks.

Common Digital Themes

A person may believe that their phone is recording them at all times, that apps are sending secret signals, that notifications contain coded threats, that search results are being manipulated specifically against them, or that strangers online are coordinating harassment. They may repeatedly factory-reset phones, buy new devices, delete accounts, cover cameras, unplug routers, or avoid using the internet.

Some may interpret ordinary algorithmic recommendations as personal messages. A video suggestion, advertisement, typo, glitch, or repeated topic may feel like evidence that someone is watching their private life. This can become extremely distressing because digital life is everywhere. The person may feel there is no private space left.

How to Think About Digital Concerns Safely

A balanced approach is important. It is reasonable to use basic digital safety habits: strong passwords, two-factor authentication, software updates, privacy settings, and checking devices with a trusted professional when there is a clear reason. However, endless checking can become part of the delusional loop.

If multiple experts find no evidence of hacking, but the belief remains absolutely certain and keeps expanding, the concern may no longer be only technical. It may be part of a persecutory delusion or another psychosis-related symptom. In that situation, mental health assessment is just as important as device security.

Balanced Rule

Take reasonable digital safety steps once. If the fear keeps growing despite clear checks, repeated reassurance, and lack of evidence, the problem may be less about the device and more about the threat-belief cycle.

13. Impact on Work, Family, Relationships, and Social Life

Persecutory delusions can affect almost every part of life. The person may not only suffer from the belief itself, but also from the consequences of living around it. Work, family, friendships, sleep, finances, health, and daily routines may all become tangled in the fear.

Impact on Work or Study

At work or school, the person may become distracted by perceived threats. They may spend time analyzing coworkers’ behavior, saving messages, checking who talked to whom, or trying to prove that people are plotting against them. Concentration may fall. Deadlines may be missed. Meetings may feel hostile. Feedback may be interpreted as attack.

In some cases, the person may resign, stop attending classes, file repeated complaints, accuse colleagues, or become involved in workplace conflict. From the outside, this may look like poor performance or difficult behavior. From the inside, the person may feel they are trying to survive a hostile environment.

Impact on Family

Family members often become exhausted and confused. They may be accused of poisoning food, hiding cameras, lying, cooperating with enemies, or refusing to help. If they argue directly, the person may become more defensive. If they agree too much, they may accidentally strengthen the delusion. This creates a painful trap.

A more helpful family response usually focuses on distress and safety rather than debating every detail. For example, instead of saying, “That’s ridiculous,” a family member might say, “I can see you feel very unsafe right now. I want us to get support so you do not have to carry this fear alone.”

Impact on Romantic Relationships

In romantic relationships, persecutory delusions can create mistrust, accusations, emotional distance, and fear. A partner may be accused of cheating, spying, reporting information, hiding devices, poisoning food, or being part of a plot. Reassurance may work only briefly, then the doubt returns.

The partner may begin walking on eggshells, avoiding certain topics, or constantly proving loyalty. Over time, both people may become trapped: one in fear, the other in exhaustion.

Impact on Friendships and Social Life

Friends may pull away because they do not know what to say. The person may withdraw because others feel unsafe, suspicious, or untrustworthy. Social isolation then increases, and isolation can make persecutory beliefs worse because there are fewer grounding conversations, fewer normal experiences, and fewer chances to test alternative explanations.

Impact on Physical Health

Chronic fear affects the body. Sleep may become poor because the person feels they must stay alert. Appetite may decline if they fear poisoning. Stress can worsen headaches, stomach problems, muscle tension, fatigue, and concentration. If the person avoids doctors because they believe medical professionals are involved, physical illnesses may go untreated.

Impact on Money and Legal Problems

Some people spend large amounts of money on security devices, new phones, surveillance equipment, locks, private investigations, repeated moves, legal complaints, or attempts to expose the perceived persecutor. Others may lose income because they cannot work consistently. Repeated accusations or confrontations may also create legal trouble.

Daily-Life Impact in One Sentence

Persecutory delusions can turn ordinary life into a constant threat investigation, where work, sleep, food, technology, relationships, and public spaces all become potential danger zones.

14. Risk Warning Signs

Persecutory delusions can range from distressing but manageable to urgent and dangerous. Risk increases when the person feels trapped, desperate, unable to sleep, unable to eat, extremely agitated, or convinced that harm is imminent. Risk also increases when the person believes they must confront, expose, punish, escape from, or defend themselves against the perceived persecutor.

It is important to take warning signs seriously without assuming that every person with persecutory delusions will harm themselves or others. Many people with psychosis are vulnerable and frightened rather than dangerous. The goal is not to stigmatize, but to recognize when professional help is needed quickly.

Warning Signs That Need Prompt Professional Help

Professional help should be sought promptly if the person is losing sleep for many nights, refusing food or water, stopping essential medication because of poisoning fears, becoming increasingly isolated, hearing voices that intensify the belief, making repeated reports or accusations, or becoming unable to work, study, or care for themselves.

Help is also important if the belief is spreading rapidly. For example, the person first suspects one neighbor, then the whole street, then the police, doctors, family, coworkers, and strangers online. Rapid expansion can mean the delusional system is becoming more intense and harder to interrupt.

Emergency Red Flags

Urgent or emergency support may be needed if there are suicidal thoughts, threats toward others, plans to confront someone, weapons, severe agitation, command hallucinations, extreme fear, inability to sleep for several days, confusion, sudden personality change, seizure-like symptoms, fever, head injury, or signs that the person may harm themselves while trying to escape the perceived threat.

When It May Be an Emergency

Seek urgent help if the person talks about suicide, threatens someone, has a plan to “act first,” carries weapons because of the belief, refuses food or essential medicine, cannot sleep for days, appears severely confused, or seems unable to stay safe.

If there is immediate danger, contact local emergency services or go to the nearest emergency department. Persecutory delusions are treatable, but acute risk should not be handled alone.

Why Early Help Matters

The longer a persecutory delusion dominates daily life, the more it can become woven into memory, habits, relationships, and identity. Early support can reduce distress, improve sleep, lower risk, protect relationships, and help the person regain a sense of safety before the belief becomes more entrenched.

Treatment does not always begin by forcing the person to admit the belief is false. Often, the first step is stabilizing fear, sleep, stress, substance use, safety, and trust. Once the person feels less threatened, it becomes easier to explore alternative explanations and reduce the grip of the belief.

Part 2 Takeaway

The symptoms of persecutory delusions involve more than a single false belief. They include intense fear, strong conviction, suspicious interpretation of neutral events, repeated checking, avoidance, digital threat concerns, relationship conflict, work problems, sleep disruption, and safety behaviors that may accidentally keep the belief alive.

Common examples include believing neighbors are spying, coworkers are sabotaging a career, food is being poisoned, strangers are following, phones are hacked, or online posts are secretly aimed at the person.

In Part 3, we will look at causes and brain mechanisms, including dopamine, aberrant salience, predictive coding, trauma, worry, self-esteem, substance-induced psychosis, medical causes, and how clinicians distinguish persecutory delusions from PTSD, OCD, paranoid personality disorder, and real-life threats.

15. Causes and Risk Factors of Persecutory Delusions

Persecutory delusions usually do not come from one single cause. They are better understood through a biopsychosocial lens, where brain vulnerability, stress, trauma, sleep disruption, substance use, social experiences, and psychological patterns all interact. In other words, persecutory delusions are not a character flaw, a lack of intelligence, or simply “thinking too much.” They are a serious distortion in how the brain and mind interpret threat.

A useful way to think about the process is this: the brain begins to assign danger and personal meaning to events that may actually be neutral, random, or explainable in ordinary ways. Then the mind tries to build a story around that sense of danger. If the story becomes fixed, highly certain, resistant to correction, and centered on intentional harm, it may develop into a persecutory delusion.

Big Picture

Persecutory delusions often arise when threat detection becomes overactive, ordinary events feel unusually meaningful, and the person’s mind explains that feeling through the idea that someone is intentionally trying to harm them.

Risk factors can be grouped into several broad categories: biological vulnerability, dopamine and salience systems, cognitive biases, trauma, chronic worry, negative self-beliefs, sleep problems, substance use, medical conditions, and social stress. None of these factors automatically causes persecutory delusions by itself. They raise vulnerability, especially when several occur together.

Biological Vulnerability

Some people have a higher biological vulnerability to psychosis. This may involve genetics, neurodevelopment, brain connectivity, stress sensitivity, and differences in dopamine, glutamate, GABA, and other neural systems. In conditions such as schizophrenia spectrum disorders, these vulnerabilities can make the brain more likely to misread reality under pressure.

This does not mean there is one “persecutory delusion gene.” There is no single switch that turns the symptom on. Risk is usually polygenic and complex, meaning many small biological vulnerabilities may add together. Environmental stress, trauma, substances, sleep loss, or medical illness can then push the system further toward psychosis.

Stress and Sleep Loss

Stress does not create delusions in everyone, but it can strongly worsen suspicious thinking in vulnerable people. Chronic stress keeps the body in a state of alertness. Sleep loss makes threat detection more unstable, weakens reality testing, increases emotional reactivity, and makes coincidence feel more meaningful. When someone is exhausted, anxious, and scanning for danger, the mind has fewer brakes.

For some people, the pathway may look like this: stress increases worry, worry increases checking, checking increases attention to ambiguous details, ambiguous details increase fear, and fear strengthens the belief that a threat exists. If sleep collapses at the same time, the whole system becomes easier to destabilize.

Social Stress and Isolation

Social isolation can also maintain persecutory delusions. When a person has fewer trusted relationships, fewer ordinary conversations, and fewer grounding routines, there are fewer chances for their fears to be gently challenged. The mind can become an echo chamber. The person thinks about the threat repeatedly, gathers more “evidence,” and gradually feels more alone against the world.

Social defeat, bullying, exclusion, discrimination, unemployment, unstable housing, and repeated humiliation can also shape the belief that other people are dangerous. When the person later experiences odd sensations, coincidences, or social ambiguity, the mind may interpret them through this old template: “People are out to hurt me.”

16. Dopamine and Aberrant Salience

One of the most influential explanations for delusions is the idea of aberrant salience. “Salience” means importance. Normally, the brain marks certain things as important so we know what deserves attention. A loud noise, a sudden movement, a dangerous facial expression, or a meaningful message should stand out. That is useful.

In psychosis, this system may become unstable. Ordinary things can start to feel strangely important, personally meaningful, threatening, or connected. A car passing by, a stranger’s glance, a word on a screen, a notification sound, or a small coincidence may feel as if it must mean something. The person then searches for an explanation.

Aberrant salience means the brain is tagging ordinary events as unusually important, even when they may not actually be meaningful or threatening.

Dopamine is one of the key systems involved in this process. Dopamine helps the brain learn what matters, what predicts reward or danger, and what should be updated in our model of the world. When dopamine signaling becomes dysregulated, the brain may assign importance to the wrong things. The person may not simply think, “That was a random car.” They may feel, “That car is connected to me.”

This feeling of significance can be powerful. The brain does not like unexplained significance. If something feels important, the mind tries to answer: “Why does this feel important?” If the person is already frightened, isolated, traumatized, sleep-deprived, or prone to mistrust, the answer may become persecutory: “Because someone is watching me.”

Why Dopamine Alone Is Not the Whole Story

It would be too simple to say that persecutory delusions are caused only by “too much dopamine.” Dopamine may help explain why ordinary events feel important, but it does not fully explain why the story becomes specifically persecutory instead of grandiose, religious, jealous, somatic, or something else.

The content of the delusion is shaped by the person’s life history, fears, culture, emotional state, self-esteem, trauma, social environment, and existing beliefs about other people. Dopamine may light up the wrong objects on the mental map, but the mind still draws the story around those lights.

Simple Analogy

Imagine the brain has a highlighter pen. In healthy threat detection, it highlights genuinely important information. In aberrant salience, the highlighter starts marking random details. The mind then tries to explain why those details are glowing.

From Strange Importance to Persecutory Meaning

A person may first experience something vague: a strange feeling, a repeated coincidence, an uneasy body sensation, or the sense that people are looking at them differently. At this early stage, the experience may not yet be a delusion. It may simply feel odd.

The shift happens when the person builds a fixed explanation around it. The explanation may be: “They are watching me,” “They are poisoning me,” “They are hacking my phone,” or “They are trying to destroy my reputation.” Once the explanation becomes rigid and self-reinforcing, the person may begin interpreting more and more events through that same story.

17. Predictive Coding and Threat Beliefs

Another way to understand persecutory delusions is through predictive coding. This theory sees the brain as a prediction machine. The brain does not passively receive the world like a camera. It constantly predicts what is happening, compares those predictions with incoming information, and updates its model of reality.

When the brain’s prediction system works well, it can correct mistakes. If someone looks at us briefly, we may first wonder, “Are they looking at me?” Then we gather more information and realize, “No, they were looking past me.” The brain updates the prediction and the concern fades.

In persecutory delusions, this updating system may become distorted. The brain may give too much weight to threat-based interpretations and too little weight to evidence that should calm the fear. A small ambiguous detail may be treated as highly important, while clear counter-evidence may be dismissed.

Prediction Errors

A prediction error occurs when the brain expects one thing but receives something different. In ordinary life, prediction errors help us learn. If we expect a friend to arrive at 5 p.m. and they arrive at 6 p.m., the brain updates its expectation. If a familiar person suddenly acts cold, the brain notices the mismatch and tries to understand it.

In psychosis, prediction errors may feel too strong, too frequent, or too personally meaningful. Small mismatches can feel like clues. The person may connect unrelated events because each one feels charged with importance.

Threat Priors

A prior is a pre-existing expectation. If someone has a strong prior that people are dangerous, untrustworthy, humiliating, or likely to harm them, then ambiguous events may be pulled toward that interpretation. A whisper becomes gossip. A laugh becomes mockery. A delay becomes sabotage. A coincidence becomes coordination.

Trauma, bullying, discrimination, betrayal, neglect, harsh criticism, or repeated social defeat can strengthen threat-based priors. The person may not consciously choose this. The brain has learned, from experience or vulnerability, that the world is unsafe. Later, under stress or psychosis, that prior can become extremely rigid.

When the Brain Trusts Fear More Than Evidence

One of the most painful parts of persecutory delusions is that the person may trust the feeling of danger more than objective evidence. They may say, “I know it is true because I can feel it.” The body’s alarm becomes treated as proof.

But fear is not always a reliable detector of reality. Fear can be triggered by memory, trauma, stress, sleep loss, substances, anxiety, or brain changes. In persecutory delusions, the feeling of danger may be real, but the explanation for that danger may be inaccurate.

Predictive Coding in Plain English

The brain is trying to explain the world. In persecutory delusions, it may over-trust threat predictions, over-read ambiguous details, and under-use evidence that should reduce fear.

Jumping to Conclusions

Many people with persecutory delusions show a pattern called jumping to conclusions. This means reaching a strong conclusion from limited evidence. For example, one neighbor looking out the window becomes proof of surveillance. One coworker whispering becomes proof of conspiracy. One phone glitch becomes proof of hacking.

Jumping to conclusions does not mean the person is careless or foolish. It can happen when the brain is under high emotional pressure. When the threat system is activated, the mind tries to find certainty quickly. Unfortunately, quick certainty can make the delusion stronger.

18. Trauma, Low Self-Esteem, Worry, and Social Defeat

Psychological and social factors strongly shape persecutory delusions. A person’s past experiences, self-image, emotional regulation, and relationship history can influence both the content and persistence of the belief. Many cognitive models describe persecutory delusions as threat beliefs: attempts to make sense of unusual or emotionally powerful experiences through the idea that harm is coming from others.

Trauma and Intentional Harm

Trauma can increase vulnerability to persecutory thinking, especially when the trauma involved intentional harm by other people. Physical abuse, emotional abuse, sexual abuse, bullying, humiliation, stalking, family violence, exploitation, or severe betrayal can teach the brain that people are dangerous. Later, when the person feels unsafe or experiences unusual sensations, the mind may interpret present events through the template of past harm.

This does not mean every person with persecutory delusions has trauma, and it does not mean trauma always leads to psychosis. It means that trauma can shape the emotional meaning of later experiences. If the mind has already learned, “Others can hurt me on purpose,” persecutory explanations may feel more believable under stress.

Low Self-Esteem and Negative Self-Beliefs

Low self-esteem can also play a role. Some people with persecutory delusions hold painful beliefs about themselves, such as “I am weak,” “I am worthless,” “I cannot protect myself,” “People will take advantage of me,” or “I am an easy target.” These beliefs can make the person feel more vulnerable to imagined or misinterpreted threats.

The belief may then take the form: “Because I am weak or hated, others are now targeting me.” This can be especially strong in depression with psychotic features, where persecutory content may blend with guilt, shame, worthlessness, or the belief that punishment is deserved.

Worry as Fuel

Worry is not just a side effect of persecutory delusions. It can also maintain them. The person may spend hours mentally rehearsing possible dangers: “What if they come tonight?” “What if the police do not believe me?” “What if the food is poisoned?” “What if everyone is involved?” Each round of worry makes the threat story more detailed and emotionally convincing.

Worry can create a mental simulation that feels like preparation. The person may think they are staying safe by imagining every possible scenario. But the more vividly the mind rehearses the threat, the more real the threat may feel. The imagination becomes a workshop where fear keeps building its own furniture.

The Worry Loop

Worry makes the feared story more detailed. More detail makes it feel more real. The more real it feels, the more the person worries. This loop can keep persecutory delusions alive even when no new evidence appears.

Rumination and Rehearsal

Rumination means repeatedly thinking about the same fear, event, suspicion, or memory. In persecutory delusions, rumination can turn a single ambiguous event into a large narrative. The person may replay conversations, reread messages, compare dates, analyze facial expressions, and search for hidden patterns.

The more the person repeats the story, the more familiar and believable it becomes. Familiarity can be mistaken for truth. Over time, the delusion may feel less like a thought and more like a memory of reality.

Social Defeat and Exclusion

Social defeat refers to the repeated experience of being excluded, humiliated, defeated, rejected, discriminated against, or treated as an outsider. These experiences can increase mistrust and make the world feel hostile. In some vulnerable people, chronic social defeat may contribute to paranoia and psychosis risk.

If someone has repeatedly been pushed out of groups, bullied at school, rejected at work, marginalized in society, or treated as powerless, the mind may become quick to detect threat in social situations. Later, under stress, ordinary ambiguity may be interpreted as persecution.

19. Substance-Induced and Medical Causes

Persecutory delusions can occur as part of a primary psychiatric disorder, but they can also be triggered or worsened by substances, medications, neurological conditions, or medical illness. This is why a careful assessment should include substance history, medication history, physical symptoms, neurological signs, sleep pattern, and timing of onset.

Substance-Induced Psychosis

Some substances can increase paranoia and psychosis risk, especially in people who are biologically or psychologically vulnerable. Stimulants such as amphetamine, methamphetamine, and cocaine are strongly associated with paranoid and persecutory symptoms. Cannabis, particularly high-THC cannabis, can also increase psychosis risk in some people. Hallucinogens, heavy alcohol use, alcohol withdrawal, and certain sedatives or medications may also contribute depending on the case.

Substance-induced persecutory delusions may appear during intoxication, withdrawal, or after repeated use. The person may become convinced that they are being followed, watched, poisoned, set up, hacked, or attacked. In some cases, symptoms fade after the substance leaves the body. In other cases, especially with repeated exposure or underlying vulnerability, symptoms may persist and require psychiatric care.

Important

If persecutory beliefs appear suddenly after drug use, stimulant use, heavy cannabis use, medication changes, or withdrawal, medical and psychiatric assessment is important. The cause may be treatable, but risk can rise quickly.

Medical and Neurological Causes

Psychotic symptoms, including persecutory delusions, can sometimes come from medical or neurological conditions. Examples may include temporal lobe epilepsy, autoimmune encephalitis, dementia, Parkinson’s disease psychosis, brain tumors, infections, endocrine disorders, metabolic disturbances, severe vitamin deficiencies, medication side effects, delirium, head injury, or other conditions affecting the brain.

The possibility of a medical cause becomes especially important when symptoms begin suddenly, start later in life, appear with confusion, fever, seizures, severe headache, memory loss, movement changes, personality change, visual hallucinations, fluctuating consciousness, or new neurological signs.

Why Sudden Onset Matters

A slow, long-term pattern of suspiciousness is different from a sudden break from reality. If a person who has never had psychotic symptoms suddenly becomes convinced that people are poisoning them, spying on them, or plotting against them, clinicians often consider medical causes, substances, medications, sleep deprivation, severe mood episodes, and acute stressors.

This does not mean every sudden fear is medical. It means sudden psychosis should not be dismissed. The brain is an organ. When its reality-testing system changes quickly, the body deserves a serious check, not just a shrug.

Medication Effects

Some prescribed or over-the-counter medications can contribute to agitation, confusion, paranoia, hallucinations, or psychotic symptoms in certain people. This may include steroids, some Parkinson’s medications, stimulants, certain sleep medications, anticholinergic drugs, and interactions between multiple medications. Older adults may be especially vulnerable to medication-related confusion or psychosis.

Medication-related psychosis should be assessed by a qualified clinician. People should not abruptly stop prescribed medication without medical advice unless there is an immediate emergency and urgent medical help is being sought.

20. Diagnostic Context: Same Symptom, Different Conditions

A persecutory delusion is a symptom type, not a complete diagnosis by itself. The same symptom can appear in different conditions. This is why clinicians look at the full pattern: duration, mood episodes, hallucinations, disorganized thinking, negative symptoms, substance use, medical illness, trauma history, level of functioning, and risk.

Symptom vs Diagnosis

Symptom: persecutory delusion.

Possible diagnostic contexts: schizophrenia, schizoaffective disorder, delusional disorder persecutory type, bipolar disorder with psychotic features, major depression with psychotic features, substance-induced psychosis, or psychosis due to a medical condition.

Delusional Disorder, Persecutory Type

In delusional disorder, persecutory type, the person has one or more persistent delusions focused on being harmed, harassed, cheated, conspired against, sabotaged, poisoned, followed, or persecuted. Compared with schizophrenia, overall functioning may be relatively preserved outside the delusional topic. The person may sound organized, work in some situations, and manage many daily tasks, while still being intensely fixed on the persecutory belief.

Duration depends on the diagnostic system being used. DSM-style descriptions commonly refer to delusions lasting at least one month. ICD-11 describes delusional disorder as involving delusions that typically persist for at least three months and often much longer. In real clinical work, duration is interpreted together with the whole picture, not as a standalone stopwatch.

Schizophrenia

In schizophrenia, persecutory delusions may be one part of a broader psychotic syndrome. The person may also experience auditory hallucinations, disorganized thinking, disorganized behavior, reduced emotional expression, lack of motivation, social withdrawal, or decline in work and daily functioning.

In this context, the issue is not only one fixed belief. The person’s overall contact with reality may be disrupted across several domains. For example, someone may believe neighbors are spying on them, hear voices commenting on the surveillance, speak in a disorganized way, and withdraw from normal activities.

Schizoaffective Disorder

In schizoaffective disorder, psychotic symptoms occur along with major mood episodes such as depression or mania. Persecutory delusions may appear with mood symptoms, but psychosis is not limited only to mood episodes. This distinction matters because it separates schizoaffective disorder from mood disorders with psychotic features.

Bipolar Disorder with Psychotic Features

In bipolar disorder with psychotic features, persecutory delusions may appear during severe manic, mixed, or depressive episodes. During mania, the content may involve power, enemies, special status, secret missions, or being targeted because of unusual importance. During bipolar depression, the content may be darker and more shame-based.

A key question is timing: do the delusions happen only during mood episodes, or do they continue when mood symptoms are not present? If psychosis appears only during mood episodes, clinicians think more strongly about a mood disorder with psychotic features. If psychosis persists outside mood episodes, the diagnostic picture may shift.

Major Depression with Psychotic Features

In major depression with psychotic features, persecutory delusions may be colored by guilt, worthlessness, punishment, shame, or hopelessness. A person may believe that others hate them, want to remove them, are punishing them, or are exposing them because they are bad or guilty.

The belief may sound like persecution, but the emotional root is often deeply depressive. The person may feel they deserve harm or that everyone has discovered something unforgivable about them. This can increase suicide risk and needs urgent clinical attention.

Substance-Induced or Medical-Condition Psychosis

In substance-induced or medical-condition psychosis, the form of the delusion may look similar, but the origin is different. A person may believe they are being followed or poisoned, but the symptom may be driven by stimulant use, cannabis, alcohol withdrawal, medication effects, seizure disorder, autoimmune encephalitis, dementia, delirium, or another medical condition.

This is why clinicians do not diagnose based only on the content of the belief. They ask: When did it start? What changed before onset? Was there substance use? Are there mood episodes? Are there hallucinations? Is there confusion? Are there neurological symptoms? Is the person sleeping? Has there been a medication change? Has functioning declined?

21. Differential Diagnosis: What Else Can Look Similar?

Persecutory delusions can resemble several other experiences. A careful distinction matters because the support needed for PTSD, OCD, paranoid personality traits, social anxiety, real-life harassment, or a psychotic disorder may be very different. The goal is not to label someone quickly. The goal is to understand what is actually happening.

Persecutory Delusions vs Real-Life Threats

Real stalking, abuse, workplace bullying, harassment, discrimination, scams, cyberstalking, domestic violence, and unsafe environments do exist. A person can be afraid because something real is happening. Therefore, it is dangerous and unfair to dismiss every fear as a delusion.

The clinical question is whether the belief is supported by reliable evidence, whether the explanation fits the facts, whether alternative explanations can be considered, and whether the person’s certainty has become disconnected from reality. Real threats usually leave verifiable patterns. Persecutory delusions often expand beyond the evidence and absorb contradiction into the belief.

Careful Rule

Do not automatically validate the belief, but do not automatically dismiss the fear either. Check safety, evidence, context, and risk with care.

Persecutory Delusions vs PTSD Hypervigilance

PTSD can involve hypervigilance, exaggerated startle response, avoidance, nightmares, flashbacks, and a strong sense that danger is nearby. This can look similar to persecutory delusions because the person may scan for threat and feel unsafe.

The difference is that PTSD fear is usually anchored to a real trauma or trauma reminder. The person may know, at least partly, that the current situation is not identical to the past event, even though the body reacts strongly. In persecutory delusions, the person may develop a fixed belief that a current person, group, or system is intentionally targeting them now, even without reliable evidence.

The two can also overlap. Trauma can increase risk for paranoid thinking, and some people may have both PTSD symptoms and psychotic symptoms. That is why a careful clinical assessment matters.

Persecutory Delusions vs OCD Checking

OCD can involve repeated checking, intrusive fears, and rituals. Someone with checking-type OCD may repeatedly check locks, stoves, messages, health symptoms, or safety-related details. On the surface, this may resemble the checking seen in persecutory delusions.

The motivation is often different. In OCD, the fear may be: “What if I made a mistake and something terrible happens?” The person often experiences the thought as intrusive, unwanted, and ego-dystonic. They may know the fear is excessive, even if they cannot stop checking.

In persecutory delusions, the fear is more likely to be: “Someone else is intentionally doing this to harm me.” The belief may feel true rather than intrusive. The checking is aimed at detecting a persecutor, not preventing personal responsibility for an accident.

Persecutory Delusions vs Paranoid Personality Disorder

Paranoid Personality Disorder involves long-standing suspiciousness and mistrust. A person may often suspect that others are lying, exploiting, betraying, humiliating, or hiding motives. This can cause relationship conflict and emotional distance.

The difference is that paranoid personality traits usually stay closer to shared reality. The person may be suspicious, guarded, and difficult to reassure, but their beliefs are not typically as fixed, bizarre, or detached from reality as psychotic delusions. In persecutory delusions, the belief often becomes more specific, more rigid, more resistant to evidence, and more disruptive.

Persecutory Delusions vs Social Anxiety

Social anxiety can involve fear that others are judging, criticizing, or noticing flaws. A socially anxious person may worry that people are laughing at them, thinking badly of them, or watching them make mistakes. This can resemble mild paranoia.

The difference is that social anxiety usually centers on embarrassment, judgment, or rejection. Persecutory delusions center on intentional harm, sabotage, surveillance, poisoning, conspiracy, or persecution. A socially anxious person may fear negative evaluation. A person with persecutory delusions may believe others are actively plotting harm.

Persecutory Delusions vs Cultural or Religious Beliefs

Diagnosis must consider cultural and religious context. A belief is not automatically a delusion simply because it sounds unusual to outsiders. Some spiritual, religious, or cultural beliefs are shared by a community and are meaningful within that worldview.

A delusion is more likely when the belief is highly personal, fixed, unsupported by the person’s cultural context, resistant to evidence, and causing distress or impairment. Clinicians must be careful not to mistake cultural difference for psychosis.

Persecutory Delusions vs Delusions of Reference

Delusions of reference involve the belief that neutral events, messages, media, gestures, or comments are personally directed at the person. For example, the person may believe that a news anchor, song lyric, license plate, social media post, or stranger’s gesture contains a hidden message for them.

Delusions of reference can overlap with persecutory delusions, but they are not exactly the same. If the person believes the message is personally directed but not harmful, it may be referential without being persecutory. If the message is believed to be part of harassment, threat, humiliation, surveillance, or harm, then it may become part of a persecutory delusional system.

Similar Condition or Experience	Main Fear	Key Difference from Persecutory Delusions
Real-life threat	Actual stalking, abuse, harassment, bullying, or danger.	Evidence and context support the concern.
PTSD hypervigilance	Trauma reminders and fear of danger returning.	Fear is usually anchored to real trauma memories or reminders.
OCD checking	“What if I made a mistake and caused harm?”	The thought is often intrusive and responsibility-based, not centered on an intentional persecutor.
Paranoid Personality Disorder	Long-standing mistrust and suspicion.	Beliefs are usually less fixed, less bizarre, and closer to shared reality.
Social anxiety	Fear of embarrassment, judgment, or rejection.	The theme is evaluation, not intentional harm or conspiracy.
Delusions of reference	Neutral events feel personally directed.	It becomes persecutory when the message is believed to involve harm, threat, harassment, or sabotage.

Why Differential Diagnosis Matters

Two people may both say, “I feel watched,” but the meaning can be completely different. One may have trauma-related hypervigilance. Another may have social anxiety. Another may be experiencing real harassment. Another may have a persecutory delusion as part of schizophrenia, delusional disorder, severe depression, mania, substance-induced psychosis, or a medical condition.

The correct response depends on the correct understanding. Trauma needs trauma-informed care. OCD needs targeted treatment for obsessions and compulsions. Real danger needs safety planning. Substance-induced psychosis needs substance and medical management. Persecutory delusions need careful psychiatric assessment, risk evaluation, and often combined psychological and medical treatment.

Part 3 Takeaway

Persecutory delusions are best understood through a biopsychosocial model. Dopamine and aberrant salience may make ordinary events feel unusually important. Predictive coding problems may cause the brain to over-trust threat-based interpretations. Trauma, low self-esteem, worry, social defeat, isolation, sleep loss, substances, and medical conditions can all shape or intensify the belief.

The same persecutory belief can appear in many diagnostic contexts, including schizophrenia, schizoaffective disorder, delusional disorder persecutory type, bipolar disorder with psychotic features, major depression with psychotic features, substance-induced psychosis, and psychosis due to medical conditions.

In Part 4, we will focus on treatment, family support, what not to say, emergency signs, practical next steps, FAQ, and references.

22. Treatment and Management of Persecutory Delusions

Treatment for persecutory delusions is not simply about forcing someone to “admit they are wrong.” In real clinical care, the first goals are usually to reduce fear, improve sleep, lower risk, rebuild trust, treat the underlying condition, and help the person regain daily functioning. Once the person feels less threatened, it becomes easier to explore alternative explanations and loosen the grip of the belief.

The right treatment depends on the full diagnosis. A persecutory delusion may appear in schizophrenia, schizoaffective disorder, delusional disorder persecutory type, bipolar disorder with psychotic features, major depression with psychotic features, substance-induced psychosis, or psychosis due to a medical condition. Because the same symptom can come from different causes, assessment matters. A psychiatrist or qualified mental health professional will usually look at the timeline, mood symptoms, hallucinations, substance use, medical history, sleep, trauma, risk, and level of functioning.

Main Treatment Goals

Treatment usually focuses on reducing distress, improving safety, restoring sleep, lowering the intensity of the belief, treating the underlying disorder, and helping the person return to work, study, relationships, and daily routines.

The goal is not to win an argument. The goal is to help the person feel safer in reality.

A good treatment plan often combines several approaches. Medication may be needed when the delusion is part of an established psychotic disorder or a severe mood episode. Psychological therapy can help with worry, threat interpretation, safety behaviors, self-esteem, trauma, and belief flexibility. Family support can reduce conflict and isolation. Practical changes such as sleep stabilization, substance reduction, and crisis planning can also make a major difference.

Why Treatment Should Be Individualized

There is no single treatment script that fits everyone. A person with stimulant-induced persecutory delusions may need urgent substance-related care. A person with severe depression and persecutory guilt may need treatment for psychotic depression. A person with schizophrenia may need long-term psychosis care. A person with sudden late-life symptoms may need medical and neurological assessment. A person who refuses food because of poisoning beliefs may need immediate medical attention.

This is why persecutory delusions should not be handled with guesswork. The belief may sound similar across people, but the engine underneath can be very different.

23. Medication and Clinical Assessment

When persecutory delusions occur as part of a psychotic disorder, antipsychotic medication is commonly used. Antipsychotics can reduce delusional conviction, hallucinations, agitation, and the sense that ordinary events are threatening or personally significant. However, medication choice depends on diagnosis, severity, medical history, side effects, age, physical health, pregnancy status, substance use, and past treatment response.

Antipsychotics are not all the same. Some have higher risk of sedation, weight gain, metabolic changes, movement side effects, prolactin elevation, heart rhythm effects, or emotional dulling. A clinician may adjust the dose, switch medication, use long-acting injections, or combine treatment with psychological therapy depending on the case.

Medication Is a Clinical Decision

Medication should be planned with a qualified clinician. People should not start, stop, increase, or suddenly discontinue antipsychotic medication without medical advice, unless there is an immediate emergency and urgent medical help is being sought.

Medication in Different Diagnostic Contexts

In schizophrenia spectrum disorders, antipsychotic treatment may be central to reducing positive symptoms such as delusions and hallucinations. In bipolar disorder with psychotic features, mood stabilizers or other mood-focused treatment may also be needed. In major depression with psychotic features, treatment may involve antidepressant and antipsychotic strategies, and in severe or life-threatening cases, clinicians may consider other interventions.

In substance-induced psychosis, treatment may involve stopping the substance, managing withdrawal, addressing intoxication, reducing relapse risk, and monitoring whether psychotic symptoms persist after the substance has cleared. In psychosis caused by a medical condition, the underlying medical cause must be treated whenever possible.

When Medication Alone Is Not Enough

Medication may reduce intensity, but persecutory delusions can be maintained by worry, sleep loss, trauma, isolation, safety behaviors, low self-esteem, and social stress. If these maintaining factors are not addressed, the person may remain frightened even when the belief becomes less intense. This is why psychological therapy, family support, and practical recovery planning are often important.

24. CBT for Psychosis and Psychological Therapy

Cognitive Behavioral Therapy for psychosis, often called CBTp, is one of the main psychological approaches used for psychotic symptoms, including persecutory delusions. It does not begin by mocking, attacking, or directly forcing the person to abandon the belief. Instead, therapy usually builds a shared understanding of what keeps the fear going and helps the person test interpretations more safely.

A therapist may explore what the person believes is happening, how certain they feel, what triggers the fear, what they do to stay safe, how much time the belief consumes, what evidence supports the belief, what evidence does not fit, and what alternative explanations might be possible. The work is careful, gradual, and collaborative.

Targets in Therapy

Therapy for persecutory delusions may focus on several maintaining factors. Worry is often a major target because repeated catastrophic thinking can make the threat story feel more real. Sleep is another major target because poor sleep increases emotional reactivity and weakens reality testing. Safety behaviors are also important because they may accidentally keep the belief alive.

Other therapy targets may include low self-esteem, trauma-related beliefs, social withdrawal, hostile interpretations of others, jumping to conclusions, shame, depression, anger, and substance use. In some cases, therapy also helps the person gradually return to avoided places, rebuild relationships, and reduce checking behaviors.

Helpful Therapy Question

Instead of asking only, “Is the belief true or false?” therapy may ask, “What keeps this fear feeling so powerful, and what helps the person feel safe enough to question it?”

Behavioral Experiments

In CBTp, a behavioral experiment is a careful way to test a fear in real life without overwhelming the person. For example, if someone believes that sitting near a window will cause immediate surveillance or attack, therapy might gradually explore what happens when the person changes one small safety behavior in a controlled way. The goal is not to trick the person, but to gather new evidence safely.

Behavioral experiments should be planned with sensitivity. If done too aggressively, they may increase fear. If done well, they can help the person discover that some feared outcomes do not occur even when safety behaviors are reduced.

The Feeling Safe Programme

The Feeling Safe Programme, developed by the Oxford group, is a specialized psychological treatment for persistent persecutory delusions. It targets several factors that can maintain persecutory beliefs, such as worry, poor sleep, low self-confidence, safety behaviors, anomalous experiences, and reasoning biases. Clinical trials have reported promising results for reducing persistent persecutory delusions compared with control interventions.

This does not mean every person needs the same program or that one therapy works for everyone. Access, therapist training, diagnosis, severity, risk, and personal readiness all matter. Still, the research is important because it shows that persecutory delusions can respond to targeted psychological treatment, not only medication.

Trauma-Informed Therapy

If trauma is part of the person’s history, therapy should be trauma-informed. That means the therapist does not treat the person’s fear as random nonsense. The fear may be connected to real experiences of harm, betrayal, humiliation, violence, or neglect. Trauma-informed work can help the person separate past danger from present reality, reduce shame, and rebuild a sense of safety.

Trauma work should usually happen after the person is stable enough. If psychosis is acute, sleep is severely disrupted, or risk is high, stabilization comes first. Opening traumatic material too early can sometimes make symptoms worse.

25. How Family and Friends Can Help

Family and friends often feel trapped between two bad options. If they agree with the delusion, they may strengthen it. If they bluntly deny it, the person may feel attacked, dismissed, or even more convinced that everyone is involved. The best approach usually sits between those extremes: do not validate the false belief, but do validate the fear and distress.

For example, instead of saying, “Yes, your neighbors are definitely spying on you,” a safer response might be: “I can see this feels terrifying. I do not see the same evidence, but I believe that you feel unsafe, and I want us to get help with that fear.”

A Safer Communication Formula

1. Acknowledge emotion: “I can see you feel scared.”

2. Avoid confirming the delusion: “I do not have evidence that this is happening.”

3. Offer support: “I want to help you feel safer and talk to someone who understands this.”

This keeps the door open without feeding the belief.

Stay Calm and Concrete

Calmness matters. A frightened person may read anger, sarcasm, or panic as proof that something is wrong. Speak slowly. Use simple sentences. Avoid long debates. Focus on immediate needs: sleep, food, medication, safety, reducing stress, and contacting professional help.

If the person is highly agitated, this is not the moment for deep philosophical debate about reality. It is the moment to lower the temperature in the room.

Do Not Become the Investigator

It is natural to want to prove the person wrong by checking every camera, every phone setting, every wall, every post, every sound, and every person they suspect. But endless checking can become part of the delusional loop. The more everyone investigates, the more the belief may feel important.

Reasonable safety checks are fine, especially when there is a genuine possibility of real danger. But repeated checking with no endpoint can feed the belief. A better approach is to set gentle limits: “We checked this once carefully. I do not think more checking will help tonight. Let’s focus on sleep and support.”

Encourage Professional Help Without Making It a Threat

Many people resist mental health care because they fear being judged, controlled, hospitalized, or labeled. Instead of saying, “You need a psychiatrist because you are delusional,” it may be more effective to say, “You have been under extreme stress and fear. A professional may help you sleep, feel safer, and not carry this alone.”

If the person has a trusted primary care doctor, therapist, psychiatrist, community mental health worker, or religious/community support person who does not inflame the belief, that trust can be a bridge to care.

Support Daily Stability

Practical support can reduce symptom intensity. Help the person keep regular sleep, meals, hydration, medication appointments, calm routines, and low-stimulation environments. Reduce alcohol, cannabis, stimulants, and other substances that may worsen paranoia or psychosis. Encourage gentle social connection without forcing overwhelming exposure.

Stability does not cure everything by itself, but it gives the brain fewer fires to fight.

26. What Not to Say to Someone with Persecutory Delusions

Words can either lower threat or raise it. When someone feels persecuted, mocked, or watched, harsh correction can feel like another attack. Even if the belief is false, the fear is real to them. The goal is to avoid phrases that shame, provoke, or push the person deeper into defensive certainty.

Avoid Saying	Why It Can Backfire	Try Instead
“That’s crazy.”	It shames the person and may increase mistrust.	“I can see this is frightening for you.”
“You’re making it up.”	The person is usually not lying; they believe it.	“I believe you feel unsafe, even though I do not see the same evidence.”
“Stop thinking about it.”	It ignores the intensity of the fear and worry loop.	“Let’s do one thing right now that helps your body calm down.”
“Yes, they are definitely after you.”	It may strengthen the delusion.	“I do not know that this is happening, but I know you feel scared.”
“Prove it or shut up.”	It can escalate anger, shame, and defensive certainty.	“Let’s write down what happened and discuss it with a professional.”

The best tone is firm, calm, and compassionate. You can refuse to confirm the delusion while still standing beside the person. That balance is the rope bridge across the ravine.

27. When to Seek Professional or Emergency Help

Professional help is important when persecutory beliefs become fixed, frightening, disruptive, or risky. Early support can reduce suffering and may prevent the belief from becoming more entrenched. Help is especially important if the person’s sleep, food intake, work, relationships, self-care, or safety are affected.

Seek Professional Help Soon If...

A mental health assessment is strongly recommended if the person is convinced that others are spying on, poisoning, following, mocking, hacking, sabotaging, or plotting against them without reliable evidence, especially if the belief is growing stronger over time.

Help is also needed if the person is repeatedly checking for hidden cameras or devices, refusing food, avoiding work or school, cutting off loved ones, filing repeated complaints, collecting large amounts of “evidence,” staying awake to monitor danger, or becoming increasingly isolated.

Seek Urgent Help If...

Urgent support may be needed if the person is severely agitated, has not slept for several days, is refusing food or water, has stopped essential medication, is hearing voices that intensify the threat, believes they must escape immediately, or is unable to care for themselves.

Seek Emergency Help Immediately If...

Emergency help is needed if the person talks about suicide, threatens to harm someone, has a plan to “act first,” carries weapons because of the belief, attempts to confront a suspected persecutor, becomes dangerously confused, has seizures, has fever with confusion, shows sudden severe personality change, or appears unable to stay safe.

Emergency Reminder

If there is immediate danger to the person or others, contact local emergency services or go to the nearest emergency department.

If the person is suicidal, violent, severely confused, refusing essential food or medication, or planning to confront someone they believe is persecuting them, do not try to manage the situation alone.

Practical Next Steps

If there is no immediate danger, a practical first step is to arrange an appointment with a psychiatrist, clinical psychologist, primary care physician, or community mental health service. If the person refuses psychiatric care, starting with sleep, stress, anxiety, or physical health may feel less threatening.

It can help to write down a calm timeline: when the belief started, what changed before it began, whether there was substance use, sleep loss, trauma, medication change, mood episode, hallucinations, confusion, or functional decline. This information can help clinicians distinguish between psychiatric, substance-related, and medical causes.

Information to Bring to an Assessment

Useful details include symptom timeline, sleep pattern, mood changes, substance use, medication changes, medical problems, neurological symptoms, family history, safety concerns, and how much the belief affects work, school, relationships, eating, hygiene, and daily life.

A clear timeline can do more than a dramatic argument. Clinicians love timelines the way detectives love footprints.

28. Frequently Asked Questions About Persecutory Delusions

1. Are persecutory delusions the same as paranoia?

Not exactly. Paranoia is a broader term that can include suspicion, mistrust, paranoid thoughts, or fear that others may harm or judge you. Persecutory delusions are more severe. They involve a fixed false belief that someone is intentionally trying to harm, spy on, poison, sabotage, harass, or persecute the person, despite a lack of reliable evidence.

2. Can persecutory delusions happen without schizophrenia?

Yes. Persecutory delusions can occur in schizophrenia, but they can also appear in delusional disorder persecutory type, schizoaffective disorder, bipolar disorder with psychotic features, major depression with psychotic features, substance-induced psychosis, and psychosis due to medical or neurological conditions.

3. What are common examples of persecutory delusions?

Common examples include believing that neighbors are spying, coworkers are conspiring to ruin a career, food is being poisoned, strangers are following, phones are hacked, hidden cameras are installed, online posts are coded attacks, or an organization is secretly trying to harm the person.

4. Can persecutory delusions be caused by stress?

Stress alone does not usually explain everything, but severe or chronic stress can worsen suspicious thinking and increase vulnerability in some people. Stress, sleep loss, trauma, substance use, mood episodes, and biological vulnerability may combine to increase risk.

5. Can trauma lead to persecutory delusions?

Trauma can increase vulnerability, especially when the trauma involved intentional harm by other people, such as abuse, bullying, violence, humiliation, or betrayal. Past harm can teach the brain that people are dangerous. Later, under stress or psychosis, the mind may interpret ambiguous events as signs of current persecution.

6. Can cannabis or stimulants trigger persecutory delusions?

Yes, in some people. Stimulants such as amphetamine, methamphetamine, and cocaine can produce severe paranoia and persecutory beliefs. Cannabis, especially high-THC cannabis, can increase psychosis risk in vulnerable individuals. If persecutory beliefs appear after substance use or withdrawal, medical and psychiatric assessment is important.

7. How are persecutory delusions treated?

Treatment depends on the underlying cause. It may include antipsychotic medication, treatment for mood episodes, substance-use care, medical treatment for neurological or physical causes, CBT for psychosis, family support, sleep stabilization, and risk management. Psychological therapy may target worry, safety behaviors, self-esteem, trauma, and threat interpretation.

8. Should you tell someone with persecutory delusions that their belief is false?

Directly saying “That is not real” or “You are crazy” often backfires. A better approach is to avoid confirming the delusion while acknowledging the fear. For example: “I can see you feel very unsafe. I do not see the same evidence, but I want to help you get support.”

9. Can persecutory delusions go away?

They can improve, especially with appropriate treatment and support. Some people recover significantly. Others may have symptoms that come and go or require longer-term management. Improvement is more likely when the underlying condition is treated, sleep improves, substance use is addressed, and the person receives consistent support.

10. When is it an emergency?

It may be an emergency if the person has suicidal thoughts, threatens others, carries weapons because of the belief, plans to confront someone, refuses food or essential medication, cannot sleep for several days, becomes severely confused, or seems unable to stay safe. In those situations, urgent medical or emergency help is needed.

Final Takeaway

Persecutory delusions are fixed false beliefs that someone is intentionally trying to harm, spy on, poison, control, sabotage, mock, cheat, harass, or persecute the person or someone close to them.

They are more than ordinary suspicion. They involve strong conviction, fear, threat-based interpretation, checking, avoidance, safety behaviors, distress, and often serious disruption to work, sleep, relationships, and daily life.

The cause is usually complex. Dopamine and aberrant salience, predictive coding problems, trauma, worry, low self-esteem, social defeat, sleep loss, substance use, mood episodes, and medical conditions may all play a role.

Treatment is possible. The most helpful approach is usually calm, evidence-aware, compassionate, and clinically guided: reduce fear, improve safety, treat the underlying cause, rebuild trust, and help the person return to life outside the threat story.

29. References

World Health Organization / ICD-11: Persecutory Delusion MB26.07
ICD-11 describes persecutory delusion as a delusion whose central theme is that the person, or someone close to them, is being attacked, mocked, harassed, cheated, conspired against, or persecuted.
https://www.findacode.com/icd-11/code-860615074.html

World Health Organization / ICD-11: Delusional Disorder 6A24
ICD-11 clinical descriptions explain delusional disorder as involving persistent delusions, typically lasting at least several months, while excluding better explanations such as another mental disorder, substances, medication, or medical conditions.
https://www.findacode.com/icd-11/code-1974996783.html

NICE Guideline CG178: Psychosis and Schizophrenia in Adults
NICE provides recommendations for recognition, prevention, treatment, CBT, family intervention, medication discussions, and care planning for psychosis and schizophrenia in adults.
https://www.nice.org.uk/guidance/cg178/chapter/1-recommendations

NCBI Bookshelf / StatPearls: Delusional Disorder
Overview of delusional disorder, including persecutory type, diagnostic considerations, cultural context, and clinical presentation.
https://www.ncbi.nlm.nih.gov/books/NBK539855/

NCBI Bookshelf / StatPearls: Delusions
Overview of delusions as fixed false beliefs that persist despite evidence to the contrary and are not consistent with cultural or religious norms.
https://www.ncbi.nlm.nih.gov/books/NBK563175/

Freeman D, Garety PA. A Cognitive Model of Persecutory Delusions.
Behaviour Research and Therapy. 2002;40(11):1143–1168. A foundational paper describing persecutory delusions as threat beliefs maintained by anomalous experiences, emotion, reasoning biases, and social factors.
https://pubmed.ncbi.nlm.nih.gov/12437789/

Kapur S. Psychosis as a State of Aberrant Salience.
American Journal of Psychiatry. 2003;160(1):13–23. Describes how dopamine dysregulation may make ordinary events feel unusually important, contributing to delusional explanations.
https://pubmed.ncbi.nlm.nih.gov/12505794/

Freeman D, et al. The Feeling Safe Programme.
Oxford Cognitive Approaches to Psychosis. Overview of a targeted psychological treatment programme for persecutory delusions, focusing on maintaining factors such as worry, sleep, self-confidence, safety behaviors, and reasoning biases.
https://www.psy.ox.ac.uk/research/oxford-cognitive-approaches-to-psychosis/projects-1/the-feeling-safe-programme

Freeman D, et al. Feeling Safe Trial.
The Lancet Psychiatry. 2021. A randomized controlled trial comparing a theoretically driven cognitive therapy for persistent persecutory delusions with befriending therapy.
https://www.thelancet.com/journals/lanpsy/article/PIIS2215-0366(21)00158-9/fulltext

National Institute of Mental Health: Schizophrenia
General public health information about schizophrenia symptoms, treatment, and support.
https://www.nimh.nih.gov/health/topics/schizophrenia

Medical note: This article is for educational purposes only. It cannot diagnose or replace professional care. If persecutory beliefs are intense, distressing, risky, or disrupting daily life, assessment by a qualified mental health professional is recommended. If there is immediate danger, seek emergency help.