Positive reinforcement rather than discipline after the fact may work . . .
I agree with this. What triggers my son is anything that can be perceived as neglect which is a variation on rejection, abandonment, and believe it or not abuse that only exists in his mind. Unfortunately everything feels like neglect. Oh well.
So positive reinforcement really works with him. I begin every conversation with it. [See SET communication}
I just wanted to welcome you to the board as one BPD parent to another.