A pimply rash on your buttocks can have many causes. It may be the result of the skin being irritated by tight clothes or bicycle riding. It may also be due to an allergic reaction, chemical irritant, ...
Medically reviewed by Susan Bard, MDMedically reviewed by Susan Bard, MD Buttock rashes can develop from heat, allergies, infections, or skin conditions. They can appear anywhere from the anus to ...