It treats quite a few, actually. Menstrual cramps being the most common, but also other issues, like polycystic ovarian syndrome and
endometriosis, which can cause quite some issues if left untreated.
Which you would've been aware of had you followed this issue properly from the beginning. Heavens know this thread alone has given you enough clues that birth control pills being used for medical reasons has been part of the whole Sandra Fluke issue
all along, and that this is why statements like yours and Virus' are looking so ignorant. Here's one of the quotes she made: