That's actually quite dismissive of BPD imo. Yes it can cause emotional instability and impulsivity, but non of that is within the suffers control.
Symptoms of borderline personality disorder (BPD)
The symptoms of BPD can be grouped into 4 main areas:
- emotional instability – the psychological term for this is affective dysregulation
- disturbed patterns of thinking or perception – cognitive distortions or perceptual distortions
- impulsive behaviour
- intense but unstable relationships with others
The symptoms of a personality disorder may range from mild to severe and usually emerge in adolescence, persisting into adulthood.
Taken from :-
Read about symptoms of borderline personality disorder (BPD), which include emotional instability, impulsive behaviour and intense, yet unstable, relationships with others.
www.nhs.uk