sinusitis
"I had a sinus infection 20 years ago that spread to my left eye & left frontal lobe of my brain. I had surgery on my sinuses, left eye, and my left temporal lobe of my brain removed and now have a plastic plate on the left side of my head. So I have frequent sinus infections and headaches. I was given generic Bactrim  from the VA. I have taken it 2 days and my sinuses have cleared up any.So I am still having headaches but now have nausea, and diarrhea and stomach pains. I just hope it gets rid of the infection."