People with depersonalization disorder (also known as depersonalization/derealization disorder) experience profound symptoms of mental and physical dissociation. This leaves them feeling disconnected and detached from their own minds and bodies, and possibly from the surrounding environment.
During an episode of depersonalization, a person may feel like they’re on the outside looking in, observing themselves from a distance. They may believe they have no control over their thoughts, sensations, or actions, which seem to emerge from nowhere. Episodes of derealization produce the same type of emotional detachment, but with this phenomenon it is the outside world that takes on distant or dreamlike qualities.
Many people experience such feelings from time to time. But with depersonalization disorder these symptoms are recurrent and can interfere with daily functioning, or create intense feelings of fear, discomfort, and stress that are difficult to shake.
In response to repeated episodes of depersonalization or derealization, many people slip into drug and alcohol abuse, as they search for a way to cope with or escape from their troubling symptoms. Substance use disorders and depersonalization/derealization disorder are often diagnosed together, and they must be treated together if true recovery is to occur.