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What is delusion?
2026-04-17 08:10:30
What is delusion?
A delusion is a false belief that is divorced from reality, usually characterized by a stubborn persistence in an idea that is inconsistent with facts or logic and is difficult to change even in the face of contrary evidence. Delusions are common in mental illnesses such as schizophrenia and delusional disorder, but may also occur in other psychological or physical illnesses. Its main features includeimmovable,absurdityandpersonalization. This article will start from the definition, types, causes, manifestations and coping methods to help readers fully understand the phenomenon of delusions.
1. Definition and core characteristics of delusion

The core of a delusion lies in the patient's extreme persistence in a certain belief, even if the belief clearly goes against common sense or objective facts. For example, patients may believe that they are being watched, persecuted, or have super powers. Unlike ordinary misunderstandings, delusions are often accompanied by strong emotional reactions and are difficult to correct through reasoning. Depending on their content, delusions can be divided intoDelusions of persecution(such as "Someone wants to poison me"),Delusions of grandeur(such as "I am the richest man in the world"),relationship delusions(e.g. "The TV show is targeting me") etc. Its formation may be related to genetics, brain dysfunction or psychological trauma.
2. Common types and manifestations of delusions
Different types of delusions manifest themselves in different ways. Patients with persecutory delusions often show hypervigilance and even refuse to eat or take medicine; those with grandiose delusions may be obsessed with unrealistic plans; and relationship delusions cause patients to subjectively associate unrelated events with themselves. For example, a patient may interpret a neighbor's cough as a "code signal" to harm him. These symptoms not only affect the patient's quality of life, but may also endanger the safety of others. Clinical diagnosis needs to be combined with medical history, behavioral observation and psychological assessment to avoid confusion with paranoid personality disorder.
3. Causes and influencing factors of delusions
The causes of delusions are complex and involve biological, psychological and social aspects. biologically,Abnormalities in the dopamine systemIt is considered to be closely related to delusional disorder; psychologically, childhood trauma or long-term stress may induce delusional thinking; social environment such as isolation or discrimination may also exacerbate symptoms. Certain diseases (such as Alzheimer's disease) or drug abuse (such as amphetamines) can also cause secondary delusions. It is worth noting that cultural background can affect the content of delusions. For example, patients in certain areas are more likely to have delusions related to religion or witchcraft.
4. How to deal with and treat delusions
Treatment of delusions requires a combination of medical intervention and psychological support. Antipsychotic drugs (such asRisperidone,Olanzapine) can regulate brain chemicals and relieve symptoms; cognitive behavioral therapy (CBT) helps patients identify and correct irrational beliefs; family and social support can reduce the risk of relapse. For patients with acute attacks, timely medical treatment is required to avoid self-injury or injury to others. In daily life, avoid arguing with patients about the content of their delusions, but instead guide them to receive professional help through empathy.
5. Summary and extended thoughts
Delusions are complex mental symptoms that reflect disorders of brain cognitive function. Although its symptoms may be puzzling, with scientific treatment and humanistic care, many patients can significantly improve their quality of life. The public should abandon their prejudices and understand that patients with paranoia are not "intentional mischief" but are victims of the disease. Future research needs to further explore the neural mechanisms of delusions to develop more precise treatment options. If someone around you develops suspected symptoms, it is recommended to contact a psychiatrist or psychological counseling agency as soon as possible.
| Common anti-delusion drugs | Manufacturer |
|---|---|
| Risperidone | Janssen |
| Olanzapine | Eli Lilly |
Quote sources:
1. "Diagnostic and Statistical Manual of Mental Disorders (DSM-5)", American Psychiatric Association
2. World Health Organization (WHO) Mental Health Report
3. Research paper on delusional disorder by John Kane, professor of psychiatry at Harvard Medical School
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