If the foreskin is too tight, the rupture of coitus may be caused by prepuce, eczema, circumcision and so on. 1. circumcision: mainly refers to the narrow opening of the foreskin, tightly hooped in the top of the glans, can not be upturned to reveal the glans and the coronary groove, easy to cause rupture in the same room, and may cause the foreskin inlaid. 2. Eczema: Inflammatory reaction of the foreskin caused by internal and external stimulation of a variety of factors, which may also cause localized oozing, rough skin, skin rupture and other symptoms. 3. circumcision: bacterial, trichomonas, candida and other pathogenic bacteria infection caused by inflammatory reaction of the foreskin, may also lead to tight foreskin, rupture of coitus, pain, bleeding, oozing and other symptoms. The foreskin is too tight, rupture at the same time, may be caused by other reasons, it is recommended to go to the hospital for examination, clear cause of the disease and follow the doctor’s instructions for treatment.