Dissociative Identity Disorder

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Dissociative Identity Disorder

Medically reviewed · Ratel Health editorial team · Sunday, 16 August 2026

A dissociative condition involving disruption of identity marked by two or more distinct personality states, along with recurrent gaps in memory.

Overview

Dissociative identity disorder involves disruption of identity characterized by two or more distinct personality states, along with recurrent gaps in recall of everyday events, personal information, or traumatic events beyond ordinary forgetting.

Signs and Symptoms

Symptoms can include marked discontinuity in sense of self, alterations in behavior, memory, and consciousness, and significant distress or impairment in daily functioning. Experiencing one or more of these symptoms does not necessarily mean that a person has this condition. Diagnosis requires an appropriate clinical evaluation.

Causes and Risk Factors

Dissociative identity disorder is strongly associated with severe, chronic trauma, often occurring in early childhood; the exact mechanisms are not fully understood.

Diagnosis

A diagnosis should be made by a qualified healthcare professional following a comprehensive clinical assessment. Clinicians may use established diagnostic frameworks such as DSM-5-TR and/or ICD-11 as part of a comprehensive assessment.

Treatment

Treatment depends on the individual’s symptoms, clinical history, severity, age, co-occurring conditions, and other relevant factors.

Psychotherapy

Long-term, trauma-focused psychotherapy is generally considered central to treatment, often delivered in structured phases.

Living With Dissociative Identity Disorder

Stability, safety, and a consistent therapeutic relationship are important supports during treatment.

When to Seek Professional Help

Professional evaluation may be appropriate if symptoms persist, worsen, cause significant distress, or interfere with work, school, or relationships.

Emergency Situations

If a person may be in immediate danger, is experiencing a medical or psychiatric emergency, or may harm themselves or another person, seek immediate assistance through appropriate local emergency services.

Outlook

Treatment is often long-term; many people experience improved integration and functioning with sustained, specialized care.

Related Conditions

Dissociative Amnesia

A dissociative condition involving an inability to recall important personal information, usually related to a traumatic or stressful event, beyond ordinary forgetfulness.

Depersonalization/Derealization Disorder

A dissociative condition involving persistent or recurrent experiences of feeling detached from oneself or one’s surroundings.

Post-Traumatic Stress Disorder

A condition that can develop after exposure to a traumatic event, involving intrusive memories, avoidance, negative mood changes, and heightened arousal.

Medical Information Disclaimer

Ratel Health provides general educational information and does not provide medical diagnosis, treatment, or individualized medical advice. Information on this page is not a substitute for evaluation or care from a qualified healthcare professional. Do not use this information to diagnose yourself or another person, or to start, stop, or change treatment or medication without consulting an appropriately qualified healthcare professional.

References

  • American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR).
  • National Institute of Mental Health.
  • World Health Organization. International Classification of Diseases, 11th Revision.