Dissociative Identity Disorder (DID) is a mental health condition that is also known as Multiple Personality Disorder (MPD). Patients with DID can experience a range of symptoms, including memory loss, dissociation, and multiple personalities. Other synonyms for DID include Split Personality Disorder, Dual Personality Disorder, and Dissociative Disorder. Although DID is a rare condition, it can have a significant impact on a person's life and mental health. Treatment for DID can include therapy, medication, and other forms of support that are designed to help patients manage their symptoms and improve their quality of life.