If you have prickly heat, you can use glycerin lotion, if you have folliculitis, you can use antibiotics, and if you have eczema, you can use topical glucocorticosteroids. 1. Prickly heat: when it is hot and sweaty, it is easy to cover up prickly heat, you can use prickly heat powder, glycerite lotion and so on to stop the itching. 2. Folliculitis: bumps on the buttocks can be folliculitis, if bacterial folliculitis can be treated with antibiotic ointment, such as fusidic acid cream, mupirocin ointment. 3. Eczema: there may also be eczema, which can be treated with glucocorticoid creams such as hydrocortisone cream. If the phenomenon of bumps on the buttocks is serious, you should consult a doctor in time to clarify the diagnosis. The use of the above drugs should follow the doctor’s instructions.