Temporarily inaccessible memories are often retrievable or return naturally.No effective pharmacotherapy is available.May present with dissociative fugue : wandering or purposeful travel ( associated with amnesia of identity or autobiographical information).Symptoms cannot be explained by another psychiatric disorder (e.g., dissociative identity disorder, acute stress disorder, posttraumatic stress disorder ).Symptoms are not due to substance use or another medical condition.
Symptoms cause significant social or occupational impairment. amnesia of personal history and identity) amnesia of a specific aspect of an occurrence) amnesia of a single event or time period) Inability to recall autobiographical information after a traumatic or stressful event, , that is distinct from ordinary forgetting. Most common dissociative disorder (lifetime prevalence is ∼ 7% ). Dissociative disorders are often associated with other psychiatric symptoms and conditions, including anxiety, depression, somatic symptom disorders, and eating disorders. Patients usually experience positive dissociative symptoms such as derealization, fragmentation of identity, and depersonalization (i.e., intrusive and involuntary changes in awareness and behavior) and/or negative dissociative symptoms, such as amnesia or difficulties controlling mental functions. DSM-5 recognizes the following types: dissociative identity disorder, dissociative amnesia (with or without dissociative fugue), depersonalization disorder, as well as other specified dissociative disorder and unspecified dissociative disorder. The disorders are typically seen in individuals with a history of very stressful or traumatic events and often manifest already in childhood. 
Abnormalities may also be seen in behavior, control of motor functions, and body representation. Dissociative disorders are psychiatric conditions characterized by disruption and/or discontinuity of normal consciousness, memory, identity, and perception.
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