The foreskin can occur in men of any age, generally divided into two cases: 1, foreskin long and cover the glans, but the foreskin can be turned up to expose the coronal sulcus and glans, this is called foreskin long; 2, foreskin long and wrapped glans, and weak state can not be turned up to reveal the glans and coronal sulcus, from time to time, the phenomenon of foreskin can be called prepuce, often accompanied by foreskin dirt, or foreskin plate and glans adhesion. Both of these conditions can lead to foreskin glansitis, acute urethritis, and is the culprit for the high incidence of gynecological diseases in the female partner. Therefore, circumcision should be performed as early as possible.