So about a month and a half ago I developed a strange rash under my arm (in my armpit) that did excrete something but didn't itch at all, only felt sore. I thought it was a bacterial infection so I stopped using my anti-perspirant (I've been using the same one for years) and applied a disinfectant 3 times a day. In about a week it was gone. This never happened before and I have good hygiene. Over the weekend it has come back again! It is only under my right arm, both times... I am really worried because I was raped about 2 months ago and I'm afraid I have some disgusting STD as a result... has anyone ever heard of an STD that presents itself this way? Everything is fully operational down south.