I got a burn on my left thigh about two weeks ago and was treated
for cellulitis with 500mg keflex three times a day. When I only had four pills left, I was coming down with some sort of virus, and found it impossible to stomach the antibiotics, so I stopped taking them. A few days later, I noticed that the skin around the burn was still warm to the touch (not burning hot but definitely warmer than the rest of my skin) and that I still had a low-grade fever (ranging from 99.0-99.9).