★A disorder characterised by the presence of two or more distinct personality states. →Dissociative identity disorder, previously called multiple personality disorder, is usually a reaction to trauma as a way to help a person avoid bad memories. ♥Interesting Fact:- Billiy milligan has 24 Personality disorders ★Rare:-Fewer than 1 million cases per year (India) ★Requires a medical diagnosis:- →Dissociative identity disorder is characterised by the presence of two or more distinct personality identities. Each may have a unique name, personal history and characteristics. ★People may experience:- →Behavioural: impulsivity, self-destructive behaviour, or self-harm →Mood: anxiety, feeling detached from self, or mood swings →Psychological: altered consciousness, depression, or flashback →Also common: amnesia or blackout ★Treatment:- talk therapy.