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You are here : Healthopedia.com > Medical Encyclopedia > Diseases and Conditions > Delusional Disorder
      Category : Health Centers > Mental Health (Mental Disorders)

Delusional Disorder

Overview, Causes, & Risk Factors | Symptoms & Signs | Diagnosis & Tests | Prevention & Expectations | Treatment & Monitoring | Attribution


A person with a delusional disorder has beliefs or perceptions that he or she thinks are true, but which are illogical or wrong. These beliefs or perceptions often last for at least a month.

There are six types of delusions:

  • Erotomanic type. A person with this type of delusion believes that another person, usually of higher status, is in love with him or her. This other person may be a boss or coworker, a celebrity, or a stranger.
  • Grandiose type. A person with this type of delusion believes that he or she is much more important, powerful, wealthy, or talented than he or she really is.
  • Jealous type. A person with this type of delusion believes that his or her partner has been unfaithful.
  • Persecutory type. A person with this type of delusion believes that he or she is being plotted against, spied on, or harassed by unknown enemies.
  • Somatic type. A person with this type of delusion believes he or she is ill or has other types of health problems.
  • Mixed type. A person with this type of delusion suffers from more than one of the delusions listed above.
  • What is going on in the body?

    This is a psychological disorder. Some psychological disorders are triggered by chemical imbalances in the brain.

    What are the causes and risks of the condition?

    This disorder usually begins when a person is between the ages of 40 and 55 but may occur at a younger age. It affects less than 1% of the population. It occurs equally in men and women.

    This disorder may be caused by:

  • aging
  • alcoholism
  • deafness
  • head injury
  • a "sensitive" personality
  • stress

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    Delusional Disorder: Symptoms & Signs

    Author: Gail Hendrickson, RN, BS
    Reviewer: Vincent J. Toups, MD
    Date Reviewed: 05/07/01









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    Page Last Updated: 30th May, 2006