Hazards of overcircumcision: foreskin scale often accumulates in the foreskin cavity, which can easily lead to infection. Due to the chronic stimulation of foreskin scale and inflammation, it can induce penile cancer due to the chronic stimulation of foreskin scale and inflammation. Secondary prepuce is mostly caused by infection or injury of penis head and foreskin, scar contracture of foreskin mouth, loss of elasticity of skin, foreskin cannot retract upward to show penis head. The accumulation of scale in the foreskin cavity may lead to stone formation, and long-term inflammatory stimulation may also induce cancer, and foreskin imbrication may occur when the foreskin is turned by force. The foreskin inflammatory edema caused by circumcision tightens the foreskin mouth embedded penis head, aggravating the penis head and foreskin edema, ischemic necrosis occurs in serious cases. Long-term chronic inflammation can cause narrowing of the external urethral opening and adhesion of the foreskin to the glans. In addition, circumcision may lead to premature ejaculation, because of the high sensitivity of the glans, the desire to ejaculate as soon as it touches the other genitals, it is recommended to do circumcision. Circumcision may also cause gynecological inflammation in the spouse or sexual partner if personal hygiene is not paid attention to, and long-term gynecological inflammation stimulation in the spouse or sexual partner may also be cancerous.