I took Advil for pain after my hemmroid surgery, which I believe contributed to the severity of my flare. There were lots of other problems- I didn't know I had Crohn's and never should have had the surgery in the first place- but the amount of Advil I was taking definitely didn't help.
My GI has approved me to take Advil for joint pain, but so far I refuse. I'm just too worried about what it might do to my guts. I am considering trying it for my period next week, though. The period cramps set off other cramping, and I spend the better part of the morning in the bathroom for two or three days. If I can stop the period cramping, maybe the rest won't be so bad.