If the foreskin is too long, or there is a prepuce, the possible hazards: 1, the foreskin is too long or prepuce can wrap the glans and urethral orifice, which will cause urine local residue when urinating, over time easy to form urine scale, resulting in repeated infections of the foreskin or glans. 2, the inner plate of the foreskin has a certain secretion function and wraps the glans, its secretion of ooze and shed cells, urine and other mixed together, forming The foreskin scale. This can stimulate infection for a long time and can induce the occurrence of penile cancer.3. Overcircumcision or prepuce completely wraps the glans, which can reduce the glans to receive external stimulation, so it may suffer from over-sensitive glans and premature ejaculation, which affects the patient’s sexual life.4. Overcircumcision or prepuce can cause the glans to be glandular, resulting in local edema, or even ischemic necrosis, etc.