I have a rash underneath my right breast. It is a small patch of raised bumps right on my bra line. I want to believe it's just a heat rash but I know that breast rashes can be early signs of IBC so I'm worried! It's slightly burning, hot to the touch and not particularly itchy. It popped up after a long walk in the heat yesterday and hasn't changed much since then though I've been treating it with compresses and cortisone. Please help!