Abstract
Dissociative identity disorder (DID), previously recognized as multiple personality disorder, impacts approximately 1.5% of the population. The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR), outlines various dissociative disorders (DDs), including depersonalization/derealization disorder, dissociative amnesia, DID, unspecified DD, and other specified DDs. Among these, DID stands out as the most severe, characterized by persistent depersonalization/derealization and dissociative amnesia. This case report explores the symptomatology of DID, available treatments, and the role of trauma.