A pimple growing under the private part of men may be caused by diseases such as folliculitis, genital eczema, warts and so on. It can be treated with antibiotics, antihistamines, physiotherapy and surgery if necessary. 1. Folliculitis: Folliculitis can occur anywhere there are hair follicles and is related to bacterial infection. Penile hair follicles are infected by bacteria, resulting in a localized pimple. Simple folliculitis can be treated with oral medications such as clarithromycin and minocycline, along with topical fusidic acid and mupirocin ointment. 2. Genital eczema: genital eczema is a type of eczema that can occur in the scrotum, vulva and genital area, resulting in localized single or multiple red spots, papules and blisters. You can use topical tretinoin cream, diclofenac cream and so on. Combined with drugs such as dicloxacin and ebastine, it can help relieve itching. 3. Condyloma acuminatum: Condyloma acuminatum is caused by human papillomavirus infection and may lead to wart-like lesions in the genital area. Fluorouracil ointment and imiquimod cream can be used topically. Warts can also be treated by freezing, photodynamic, and surgical excision of the warts as a whole or in batches. Men with a bump on their private parts should also find out if it is related to parasite bites. It is recommended to pay attention to local care, but also with the doctor’s advice for treatment.