Amber Heard has symptoms of borderline personality disorder according to forensic psychologist: What is it?

Forensic psychologist Shannon Curry, who was hired by actor Johnny Depp’s legal team, testified this Tuesday in the civil lawsuit between Depp and his ex-wife, actress Amber Heard, that she diagnosed the 36 year-old with borderline personality disorder (BPD) and histrionic personality disorder

Someone may have a personality disorder when their way of "thinking, feeling and behaving" deviates from the cultural expectations that causes problems with functioning over time, the association added. 

There are ten personality disorders, which are defined by affecting at least two of the following areas: the way we think about ourselves, the way we respond emotionally, the way we relate to others or the way we control our behavior.