Hey, in the past 3 weeks I've developed a seriously itchy rash around my anus. It's dark brown, and seems to be worse when I wear anything tight. It was getting better thanks to aloe vera but now aloe vera just stingers. The only helpful thing is a bath with epsom salts. What is it/where could it have come from - should I be worried? I'm embarrassed to go to a walk-in clinic without a bit more info.