I've read about rapid cycling, but I find it confusing. One of the ways I distinguish BPD and BP symptoms, is that BPD symptoms get triggered by something in the immediate situation, are intense and yet fleeting, while BP symptoms will last for days, weeks or months. It's like the difference between have a sudden angry response to something specific, and feeling generally agitated by everything over the course of days, weeks, etc. However, when I read about rapid cycling, it sounds so similar to what I've believed to be BPD symptoms. It's confusing to me.