Pimples on the skin of the penis, i.e., pimples on the skin of the penis, may be caused by pearly pimples, warts, folliculitis and other reasons. 1. Pearl-like pimples: mainly caused by long prepuce, poor personal hygiene and other reasons. The patient’s lesions may appear white, yellow or red papules in the form of pearls. The papules are hard in texture, with no pressure or pain, and they do not break. 2. Condyloma acuminatum: caused by human papilloma virus infection. The patient’s skin lesions can be manifested as papules and keratinized plaques around the genitals. The surface is prone to erosion and oozing. 3. Folliculitis: it may be caused by bacterial infection, mite parasites, low immunity and so on. The patient’s skin lesions are red papules around the hair follicles, sometimes pus, itching, pain and other symptoms. It is recommended that patients with pimples on penile skin go to the hospital in time, do relevant examinations, clarify the cause of the disease and then follow the doctor’s instructions for treatment, to avoid delaying the condition.