What is borderline personality disorder (BPD)?
BPD is a lasting pattern of emotions that arrive fast and are hard to steady, an unstable sense of self, and relationships that swing between closeness and fear of being left.
The NHS often records it as emotionally unstable personality disorder (EUPD). They are two names for the same thing. Small things, like a change of plan or a short reply, can set off a feeling that seems far bigger than the moment.