My teen was having the most horrid debilitating back pain, along with seven or eight days of bleeding during every period. Back pain would persist during the full week. For a few months we tried BSM 2x/day, ACV (poor compliance due to taste), cramp bark, raspberry leaf tea, magnesium pills and spray, dmso, aloe, traumeel, osteopathy, massage therapy, chiropractic, (etc) but back pain persisted and was still holding her back from participating in life. It also became a full-time job for me to manage. She was taking extra strength ibuprofen three time per day and her low back was still on fire to touch, We had gone to the doctor and considering BC pills.
I happened across a post about Curcumin (the active ingredient in turmeric) being effective, when nothing else worked. We began at one capsule a day for two weeks heading up to menses and continued during cycle. I also give her raspberry leaf tea in morning of day one and two. She had absolutely no cramping or pain on first try and there's no pain during menses since. Her period has been reduced to three days. This supplement is expensive (as must be bioavailable form) so be prepared, especially compared to using turmeric on its own, but it's changed her life. My daughter asked me to post this "on the internet" so other girls won't suffer as she did!