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