There may be a variety of reasons for small bumps on the buttocks, including various rashes, folliculitis, common warts, etc., caused by different reasons, the nature of the bumps will also be different, the way to deal with different. 1, rash: such as papules, may be caused by inappropriate clothing friction, manifested as a mound-shaped substantial skin damage above the surface of the skin, you can feel a more solid protrusion, can be multiple. They are usually mostly pinpoint to soybean in size and can have different forms such as pointed, round, flat or centrally depressed on top. In mild cases, hormonal creams can be applied to the affected area. In severe cases, oral antihistamines may be needed to relieve symptoms; 2. Folliculitis: Bacterial infection of the hair follicles on the buttocks can cause acute purulent inflammation of the hair follicles, initially as corn-sized follicular inflammatory papules, gradually forming pustules, which can be single or multiple, and to deeper infections can form boils and carbuncles, accompanied by pain. Patients can take physical therapy such as freezing, laser and microwave therapy to remove them. In addition, sebaceous cysts and lipomas can also appear as small bumps on the buttocks. Patients need to be treated promptly after determining the cause according to their own signs and professional examination results.