MPD has many symptoms. Some are: depression, insomnia, sleepwalking, nightmares, flashbacks, auditory and visual hallucinations, eating disorders, trances, headaches, out of body experiences, alcohol and drug abuse, compulsions, violence both self-inflicted and directed outward. People experience changes in their behavior and mannerism, changes in right and left handedness, they may show differences in their handwriting, responses to medication , allergic reactions, and eyeglass prescriptions. The Changes depend upon which personality is dominant.

No one actually knows what causes DID(MPD), but doctors and scientists have come up with possible causes for the disorder. Some of these are severe emotional, sexual, a

The estimates for the number of people with DID(MPD) varies widely. But one group of researchers say that one per cent of the general population and as many as five to twenty per cent of people in psychiatric hospitals may have DID(MPD), and ninety-eight to ninety-nine per cent of them have histories of trauma that was repetitive, overwhelming, and/or life threatening. Also, this trauma generally happened at a sensitive age which is normally before age nine.

In childhood DID(MPD) the number of personalities are fewer. The average age for adults with DID(MPD) is thirteen, but for children the average age is four (Coons, internet). Another difference between adult and childhood DID(MPD) is that the therapy for children is usually short, sometimes it may only last a few months; adult therapy may last from two to ten years. It is thought that the difference is because the children have only had the disorder for a relatively shorter period of time and only a small amount of their life was invested in having separate personalities. On the other hand the adults with DID(MPD) have much more of their life invested into having alters.

DID(MPD) is often misdiagnosed because the symptoms are similar to those of psychiatric disorders. People with DID(MPD) go through periods where they do not associate and the disorder may be missed in a clinical examination. On average, people with DID(MPD) spend seven years in treatment before an accurate diagnosis is made (Multiple Personality, internet). They go from one therapist to another, medication to medication with treatment only for symptoms but no progress is made toward curing the disorder. Many people with DID(MPD) do not

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