bacterial skin infection
"Prescribed Bactrim for boils on abdomen/legs. I was only able to take it for 3 days, due to the adverse reaction. The boils are much better (and I hope they don't come back), but the back pain, abdominal pain, nausea and diarrhea were enough to make me stop taking it. Plus, I'm not sure if this is a medicine of choice for anyone with ulcerative colitis, but now I'm having a huge flare of that! "