Depersonalization disorder or DPD is a derealization syndrome in which people feel disconnected from their bodies, thoughts, and feelings. Individuals typically report feeling that they are not in control of these things or that they are watching themselves from outside their own body, including in out-of-body experiences.

DPD can lead to a sense of hopelessness or inner distress that can lead to depression, anxiety, and phobias; it also expresses itself through physical symptoms. Experts have found that this dissociative disorder is related to severe traumatic events such as abuse, war, or even bad experiences with drugs.