A small pustule growing on the lower body may be related to diseases such as folliculitis and genital herpes, which are usually treated with medication and surgery. 1. Folliculitis: it is an inflammatory skin disease mainly involving hair follicles, there will be pimples, white pustules on the top and other symptoms, resulting in a small pustule on the lower body. It is recommended to give topical drugs such as mupirocin ointment as prescribed by the doctor, and oral antibiotic treatment in severe cases; when the effect of drug treatment is not good or abscess formation, it is necessary to give incision and drainage of the lesion. 2. Genital herpes: a disease caused by herpes simplex virus, often manifested as genital cluster blisters, erythema, pain and so on, resulting in small pustules on the lower body. It is recommended to give systemic antiviral medication such as acyclovir, valacyclovir, famciclovir, etc., and topical medication such as acyclovir cream, penciclovir cream, etc., in accordance with medical advice. Pus on the lower body may also be other diseases, it is recommended to consult a doctor to clarify the diagnosis, and follow the doctor’s instructions for treatment.