Delusional disorder: when a false belief takes over
डिल्यूज़नल डिसऑर्डर (पक्का ग़लत शक)
In delusional disorder, a person holds one or more firm false beliefs for months, while speech and much of daily life remain fairly normal. Common themes are a spouse's infidelity, being persecuted, or having a disease.
Because the person does not see the belief as an illness, families usually seek help first. Treatment can reduce distress and conflict.
Medically reviewed by Dr. Kuldeep Budania, MBBS, MD Psychiatry
Common symptoms
- Unshakeable belief despite clear evidence against it
- Constant checking of the spouse's phone, movements or contacts (jealous type)
- Complaints to police or authorities about being harassed (persecutory type)
- Conviction of having an infection or parasite despite normal tests (somatic type)
- Anger, conflict or violence linked to the belief
Causes
- Exact causes are not known; genetic and brain factors play a role
- Social isolation, hearing loss and stress may contribute
Risk factors
- Middle or older age at onset
- Alcohol use (especially in jealous delusions)
- Family history of psychosis
How it is diagnosed
- Interviews with the person and family, handled with tact and respect
- Excluding dementia, substance use and other psychotic disorders
- Assessing risk of violence to the spouse or others
Classification: ICD-10 F22 · ICD-11 6A24
Treatment options
- 1Building trust first, focusing on the distress, sleep and conflict the person feels
- 2Antipsychotic medicines, which help many people
- 3Safety planning when there is risk to others
Psychotherapy and counselling
- CBT to examine the belief gently and reduce its impact
- Couple or family sessions to reduce conflict
Guidance for family
- Do not argue repeatedly or try to "prove" innocence — it rarely works
- Ensure your own safety; seek help if threats or violence occur
- Encourage consultation for sleep or stress, which the person may accept more easily
When to see a psychiatrist
- Suspicion is causing constant conflict at home
- Any threat or violence — urgent help
Thoughts of self-harm or a medical emergency? Call Tele-MANAS 14416 (24×7, free) or 112.
Frequently asked questions
My husband/wife suspects me constantly. Is it an illness?
Persistent, unshakeable suspicion without evidence can be a delusional disorder. An assessment can clarify this.
How do I bring them for treatment?
Focus on problems they agree with — poor sleep, stress, anger. The consultation can start there.
Do medicines help?
Yes, many people show reduced preoccupation and distress with antipsychotics.
Help is available — confidential, in Hindi or English.
Private video consultation from anywhere in India with an Ajmer-based psychiatrist. Psychiatry consultation ₹500.
This page is for education and does not replace a personal consultation. Do not start or stop any medicine without a doctor's advice.