Scrotal pimples may be caused by folliculitis, scrotal eczema, scrotal sebaceous cysts and other reasons. 1. Folliculitis: Folliculitis occurs in the head, scrotum and other hairy parts, usually related to poor local hygiene, staphylococcus aureus infection, when it occurs in the scrotum, it can be manifested as scrotal acne. 2. Scrotal eczema: Scrotal eczema is confined to the skin of the scrotum, sometimes extends to the anus, and a few can be extended to the penis. It is usually caused by not paying attention to personal hygiene or contact with certain allergic substances, and patients will not only manifest as scrotal acne, but also accompanied by redness, swelling and itching. 3. Scrotal sebaceous cysts: the sebaceous glands in the scrotum are overdeveloped, and the sebaceous gland ducts are not well drained, causing localized cysts. Patients will appear at the scrotum enlarged, hard rash, painless and itchy. Therefore, scrotal acne may also be caused by scrotal sebaceous cysts. Patients with symptoms of scrotal acne, should go to the hospital in time, under the guidance of the doctor to clarify the diagnosis, and then targeted treatment.