See your doctor. Problems like these can only be correctly handled by your doctor in person. He/she needs to listen to you, perform an examination and possibly run labs or other tests. That's the only way he/she can find out what's going on and what to do about it.
I have a rash on my upper arms, armpits, breasts, back and its the worst on my stomach and tighs. It looks like red bumps, but it hardly itches at al
Pityriasis rosea? This rash, which often follows a viral or upper respiratory infection, often begins with a single patch, classically on the abdomen or armpit. It then spreads to the extremities. Only about 1/4 people suffer from itching. No treatment is usually required, especially if there is no itching. UV light/sunlight may speed recovery. It usually resolve in a matter of weeks, but up to 6 months. Good luck. Read more...