Hello, my boyfriend works at a chemical factory. I don't know if this has anything to do with my question, but I figured I would include that information. He has a rash or something on his outer thighs, close to his buttocks which is sore and almost looks like acne, but it isn't. He doesn't have an abundance of clothing, so he wears the same pair of pants multiple times a week a lot of the time. I was wondering if this rash was because of this reason.