When you look at the Wikipedia entry for Dissociative Identity Disorder (DID) -- formerly known as Multiple Personality Disorder -- you find that it has a number of possible symptoms that are also symptoms named in the nine main diagnostic criteria for BPD. Some overlapping symptoms include:
- Depersonalization
- Depression
- Derealization
- Disruption of identity characterized by two or more distinct personality states
- Distortion or loss of subjective time
- Flashbacks of abuse/trauma
- [...] panic/anxiety attacks
- Identity confusion
- Mood swings
- Paranoia
- Pseudoseizures or other conversion symptoms [looks like epileptic seizures --S.H.]
- Self-alteration (feeling as if one's body belongs to someone else)
- Sudden anger without a justified cause
- Spontaneous trance states
- Suicidal and para-suicidal behaviors (such as self injury)
- Unexplainable phobias