Rupture of skin at the corona of the penis may be related to the causes of glans circumcision, syphilis, genital herpes and so on. 1. Circumcision: If the coronal area of the penis is infected by bacteria, pimples and papules may appear, and once broken, it may be manifested as broken skin at the coronal area of the penis. 2. Syphilis: a stage of syphilis can be manifested as a small erythema, which can rapidly develop into painless papules and superficial ulcers, and so on, manifested as a broken skin at the coronal area of the penis. 3. Genital herpes: mainly in the genitals and perineum herpes, ulcers, can be accompanied by pain and other symptoms, can be manifested in the penis coronal skin. It is recommended to go to the hospital in time, clear cause, under the guidance of the doctor for standardized treatment.