What is it called when you have multiple personalities

Dissociative identity disorder

Explanation:

Dissociative identity disorder is associated with overwhelming experiences, traumatic events and/or abuse that occurred in childhood.

Symptoms of Dissociative Identity Disorder

The existence of two or more distinct identities (or “personality states”). The distinct identities are accompanied by changes in behavior, memory and thinking. The signs and symptoms may be observed by others or reported by the individual.

Ongoing gaps in memory about everyday events, personal information and/or past traumatic events.

The symptoms cause significant distress or problems in social, occupational or other areas of functioning.