Had strep throat. then rash developed on buttocks. started as sore and itchy, redness. now irritated bumps. not as itchy. how to treat?

Strep throat: Strep throat associated with a rash can be seen with scarlet fever but the rash would be nonbumpy and generalized. The itchy buttock rash suggests an allergic reaction ? To antibiotics or some substance that came in contact with your buttocks. Erythema nodosum is another type of skin lesions that can follow a strep infection. A dermatologist is best qualified to evaluate you if the rash persists.