I have a very itchy raised red rash on the

Patient: I have a very itchy raised red rash on the inside of my thighs that now seems to be spreading to my arm. Any idea what it may be?? And how to get rid of it it is extremely itchy and burns….Don’t know where I got it for Y haven’t done or been around anything different.. and I am in a monogamous relationship I know it’s not an STD

Doctor: