For the past five days, I have been experiencing a very painful
rash around my anus with a burning sensation when I urinate. It hurts even when I sit down or walk. There seem to be bumps around the area as well. The night before it broke out, I had tried horseradish (which I heard can cause burning down there) for the first time and experienced strange light-colored lumps
in my stool, so I don't know if that has anything to do with it. I am sexually active but I've been with the same person for over a year and neither of us have ever experienced anything like this before so I'm not sure if it could be an STD or anything like that. Please help!