Dissociative Identity Disorder: Symptoms & Signs

Medically Reviewed on 9/10/2019

Dissociative identity disorder is a psychological condition characterized by having at least two clear personality/self states, which may have different reactions, emotions, and body functioning. The condition was formerly referred to as multiple personality disorder.

Signs and symptoms of dissociative identity disorder blackouts or memory lapses, being accused of lying, finding what seem to be strange items among one's possessions, feeling unreal or detached from oneself, and feeling like more than one person. Other associated symptoms can include not recognizing oneself in the mirror and being recognized by strangers or called another name by strangers.

Cause of dissociative identity disorder

Doctors do not fully understand the exact cause of dissociative identity disorder, and it is likely to involve both genetic and environmental influences.

Other dissociative identity disorder symptoms and signs

  • Being Accused of Lying
  • Being Called Another Name by Strangers
  • Blackouts
  • Feeling Like More Than One Person
  • Feeling Unreal or Detached From Oneself
  • Finding Strange Items in One's Possessions
  • Memory Lapses
  • Not Recognizing Oneself in the Mirror


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Kasper, D.L., et al., eds. Harrison's Principles of Internal Medicine, 19th Ed. United States: McGraw-Hill Education, 2015.