1, when the foreskin is too long or circumcised, the secretions of the sebaceous glands in the foreskin can not be discharged, coupled with the collection of urine, will gradually form a strange smell of foreskin scale. 2, foreskin scale suitable for bacterial growth, so it can cause inflammation of the glans and foreskin. 3, the inflammation that occurs in the urethra, after healing, can cause the urethral orifice narrow, causing difficulties in urination. According to reports, about 85%-95% of penile cancer patients have a history of prepuce or foreskin; 5.Circumcision is also extremely unfavorable to women, as the husband’s foreskin is too long, the foreskin scale enters the female genital tract during sexual intercourse, which may induce cervical cancer due to long-term chronic stimulation of the cervix. 6, in addition, if the foreskin is not treated in time, the glans is locked by the foreskin for a long time, resulting in poor penile development, foreign body feeling caused by masturbation, affecting the life of children, learning, and even make the psychological development of the affected children deformed; after adulthood affects the sexual life of patients, prone to impotence and premature ejaculation. 7, the foreskin is too long and foreskin such as forcibly turned up and can not be reset, can cause foreskin inlay, serious will cause glans necrosis.