My pdoc explained to me: BPD is triggered, BP just comes along.

Granted a BPD that is triggered may have such a small trigger that it just seems emotions are coming from no-where.

I see my BP when I wake up and I am so bright and bubbly and the day seems glorious and my smile can't be bigger and I want to race to do everything life has to offer. (Or the flip side, my ability to fight for life is missing and I think I am like a cat crawling into a corner when it is about to die - only I don't die, I just wait for my brain to balance itself out and get back to its job of living).

I see my BPD when I am looking for things to be mad at and finding them, adding coals to it, and reacting. I see it when I have anything happen to me, and my response is sudden, mixed emotions that occur from any direction and have no reasonable basis.

I can see that I am able to unravel my BPD emotions. My BP emotions need to ebb on their own.