It can be really difficult to determine what is causing a rash. Best thing, in my experience, is to see a dermatologist. Can you get an appointment? It could be eczema or contact dermatitis or any number of other things. A dermatologist can tell you what it is and hopefully give you a cream or something else to treat. If it was me, I'd go as soon as possible, because I hate itching! Hope you get the info you need.