One of the main reasons that borderline personality disorder (BPD) is sometimes believed to be a misdiagnosis is that it has symptoms in commom with two other disorders. These are :
1) Asperger’s Syndrome (a milder form of autism).
2) Bipolar Disorder. This used to be called manic-depression – its key feature is that it produces dramatic mood swings ,eg from being suicidal to being ecstatic, in those who have the disorder (as you might well already know,