PMDD
Reddit discussion
Premenstrual dysphoric disorder (Wikipedia)
PMDD's exact cause is unknown. Ovarian hormone levels during the menstrual cycle do not differ between those with PMDD and the general population. But because symptoms are present only during ovulatory cycles and resolve after menstruation, it is believed to be caused by fluctuations in gonadal sex hormones or variations in sensitivity to sex hormones.
Bipolar is very likely salt related and see my previous posts on this site about epilepsy. I can't be arsed to howl into the void at length about yet another instance of "Based on exactly ZERO evidence, we shall blame the hormones."
Mmmhmmm.