I wonder if the reverse is true---if having migraines predisposes one to BP. All of the women in my family has or have had them, with the single exception being my 27-year-old, and all of us have had some sort of mental health issue (although I'm the only one actually diagnosed as bipolar). My migraines haven't recurred since I went through menopause, though...guess I got lucky on that score. But I'm definitely still bipolar.