Red spots on the buttocks, itching, may be folliculitis, eczema, scabies, as follows: 1, folliculitis: is caused by bacterial infection, can appear folliculitis papules, treatment can be topical clindamycin phosphate gel, or fusidic acid ointment treatment; 2, eczema: is due to contact with chemical fiber underwear, over-eating beef and mutton, seafood and other hair products, or spicy irritant diet caused, in the treatment can be topical Denide The treatment of scabies: caused by scabies, treatment can be applied Clomid ointment, sulfur lotion, and should also be applied to large nodules, hydrocortisone butyrate ointment treatment.