What Is a Split Personality Disorder?

Officially known as dissociative identity disorder (DID)

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"Split personality disorder" is a term that is not used in the psychiatric field. The correct term is "dissociative identity disorder (DID)." DID—as well as other types of dissociative disorders—involves symptoms that interfere with a person’s mental functioning. 

split personality disorder

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What Is Dissociative Identity Disorder (DID)?

Dissociative identity disorder (DID) is a condition marked by the presence of two or more distinct personality states within one individual. Each of these personality states may have a unique name and characteristics, including a different voice, gender, and set of mannerisms.

This mental health condition, which used to be called multiple personality disorder, is one of the dissociative disorders listed in the "Diagnostic and Statistical Manual of Mental Disorders" (DSM-5).

Using the Correct Term

"Split personality disorder" is not a term used in the psychiatric field. "Dissociative identity disorder (DID)" is the correct term.


The main symptom of DID is experiencing the presence of two or more distinct identities or personality states, sometimes known as "alters." The shifting of identities happens involuntarily and is described as being undesirable, causing severe distress or impairment to a person with DID.

Other symptoms may include:

  • Feelings of being disconnected or detached
  • Experiencing a feeling of being outside of one’s own body
  • The inability to recall specific events, people, or times
  • An inability to recall childhood memories or a personal history
  • Thoughts of self-harm or suicide


As with other mental disorders, a doctor will make a diagnosis of DID based on the criteria defined in the most recent edition of the DSM.

An in-depth history is taken to assess the person’s symptoms, and the symptoms are compared to the criteria that must be present to justify the specific diagnosis of DID. These criteria include:

  • There is a disruption of identity involving two or more distinct personality states. The signs and symptoms of the disorder may be observed by others, or they may be reported by the person having the symptoms.
  • There are ongoing gaps in memory that involve forgetting personal information, day-to-day events, and/or traumatic events of the past.
  • The person experiences significant distress or has problems functioning—such as on the job or socially—as a result of symptoms such as memory loss.
  • The symptoms are not part of a cultural, spiritual, or religious practice involving altered states of consciousness.
  • The symptoms are not the result of substance use or a medical condition.


Symptoms of DID might be misinterpreted as delusions or hallucinations and mistaken for a psychotic disorder, such as schizophrenia.


Although having a history of experiencing a traumatic event is not required as part of the DSM-5 criteria for being diagnosed with DID, trauma is almost always associated with the disorder.

In fact, some studies report about 90% of the cases of DID involve some history of trauma. Trauma can include:

  • Severe emotional, physical, or sexual abuse
  • A natural disaster (such as a tornado or earthquake)
  • Wars
  • A substantial loss early in life (such as the loss of a parent)
  • Long periods of isolation early in life (such as social isolation that occurs during a long-term illness)

Often, DID is a result of severe child abuse.


Although there isn't one specific type of medication to treat DID, medication may be useful in managing co-occurring mood, anxiety, and other symptoms.

The main treatment for DID involves the use of various therapeutic approaches. Some of the forms, or modalities, that have been proven effective include:

  • Psychotherapy: Psychotherapy, or talk therapy, can help people with DID process emotions and gain control over their symptoms. A goal of psychotherapy is to integrate the separate personality states into a more cohesive sense of self.
  • Behavioral Therapy: Two behavioral treatment modalities found to be successful for people with DID are cognitive behavioral therapy (CBT) and dialectical behavioral therapy (DBT). These modalities focus on a person’s thoughts and behaviors and managing distressing and overwhelming affects (feelings, emotions, or moods).
  • Hypnosis: Rather than being used to unearth repressed memories in people with DID (as hypnosis is historically known for), hypnosis may be used to help manage symptoms such as flashbacks from post-traumatic stress disorder, or PTSD.

Risk Factors

Because of the high rate of suicide in people with DID, part of an effective treatment plan is to watch for signs and symptoms of increased suicidal risk. More than 70% of people diagnosed with DID who participated in outpatient treatment have attempted suicide.

Seek Help

If you or someone you know are having suicidal thoughts, dial 988 to contact the 988 Suicide & Crisis Lifeline and connect with a trained counselor. If you or a loved one are in immediate danger, call 911.

For more mental health resources, see our National Helpline Database.


There are many nonmedical coping strategies that reportedly help people with DID. These include:

  • Working to overcome blaming yourself: Keep in mind that any trauma that occurred in the past is not your fault. Also, having a mental health diagnosis is not the result of something you did to deserve having the condition. Psychotherapy and support groups can help you work through undeserved feelings of self-blame.
  • Doing your research: Educating yourself about your disorder can help empower you in making treatment decisions, such as whether to try hypnosis, if you would benefit more from group or individual therapy—or both—and more.
  • Learning self-calming techniques: This will help you manage disturbing thoughts and other symptoms on your own. Take advantage of the many types of therapy (such as CBT and DBT) that teach these practical and effective tools to help improve symptoms.
  • Creating a calm outer environment: Work to de-clutter your home, office, or other areas while practicing tools to improve interpersonal relationships with friends, coworkers, and family members.
  • Planning ahead and staying organized: With a condition like DID, it’s vital to keep track of things such as when to take your medications and to plan for an unforeseen period of amnesia. 
  • Forming a support network: Having a good support system is crucial to coping with a mental illness such as DID; it’s best to have a variety of people in your network that you feel comfortable sharing your feelings with, such as family members, close friends, and healthcare providers.

Finding Support

If you are a family member of a person with DID and you don’t have a support group in place, you can visit the National Alliance on Mental Illness (NAMI) NAMI Family Support Group page. Click on your state name in the drop-down menu to find face-to-face support groups in your local area or nearby. 

7 Sources
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
  1. American Psychiatric Association. Diagnostic and Statistical Manual of Mental DisordersFifth Edition. American Psychiatric Association; 2013. doi:10.1176/appi.books.9780890425596

  2. Cleveland Clinic. Dissociative identity disorder (multiple personality disorder).

  3. American Psychiatric Association. What are dissociative disorders?

  4. Cleveland Clinic. Dissociative identity disorder (multiple personality disorder).

  5. Skyland Trail. 4 differences between CBT and DBT and how to tell which is right for you.

  6. Kluft RP. Hypnosis in the treatment of dissociative identity disorder and allied states: an overview and case studySouth African Journal of Psychology. 2012;42(2):146-155. doi:10.1177/008124631204200202

  7. Sane.org. My coping strategies for living with DID.

By Sherry Christiansen
Sherry Christiansen is a medical writer with a healthcare background. She has worked in the hospital setting and collaborated on Alzheimer's research.