The circumcision is an extremely common phenomenon among male friends, perhaps because it is more common, so many men think that it is not a serious situation, mistakenly thinking that the impact on the body is not very big. The existence of circumcision is not only harmful to the health of men, but also to their sexual partners. According to incomplete statistics, 29% of adult men in China have the phenomenon of circumcision. It is not only a reproductive disease, but also may affect the life of the couple and fertility. Therefore, the dangers of circumcision cannot be ignored. This article is a detailed introduction to the hazards of circumcision. The hazards of circumcision: 1, impede the normal development of the penis circumcision will affect the growth and development of the penis, in adolescence because the penis head is tightly wrapped by the foreskin, do not get the outside world should stimulate, may cause penis short, seriously affect the sexual pleasure. Adults will be due to the foreskin is too long or prepuce, affect the normal sex life. Especially for men whose foreskin caliber is too small, the foreskin cannot be recovered by turning it up, and the foreskin is stuck tightly in the coronal groove, becoming an embedded prepuce, which is not very painful. In serious cases, the glans will occur due to poor blood flow and edema, and even glans necrosis can occur. 2, lead to penis inflammation This is mainly because there are rich sebaceous glands in the foreskin, which can secrete a lot of sebum. When the circumcision or foreskin is too long, the secretions of the sebaceous glands in the foreskin cannot be discharged, and the sebum and urine precipitates are synthesized into the cheese-like and smelly “foreskin scale”. The foreskin scale is suitable for bacterial growth, so it can cause inflammation of the penis head and foreskin. The germs can also cause urinary tract infections through the urethra. The inflammation that occurs in the urethra can cause the urethra to narrow after healing, causing difficulty in urination. 3, serious damage to kidney function Due to inflammation of the penis, it can cause narrowing of the urethral opening or front urethra, causing difficulty in urination. Long-term difficulty in urination will damage the function of the kidneys. 4, can induce other lesions circumcision and circumcision, there is the possibility of inducing penile lesions. Modern scientific research shows that the foreskin scale is a pathogenic material, according to the survey, 85%-95% of penile lesions patients, are circumcised or circumcised. The circumcision and foreskin, not only affect their own health, if and wife intercourse, will also bring the foreskin scale into the vagina, stimulating the uterus, inducing cervical lesions. 5, affect the normal sexual function of men If men still have circumcision in adulthood, then the glans is under the thick cover of the foreskin for a long time. In this way, the glans mucosa and coronary edge nerve endings normally receive less friction and stimulation, making the glans mucosa and coronary edge nerve endings feel too sensitive, the threshold required for ejaculation will become very low. When having sex, as long as the glans and vagina are in contact with friction, the “allergic” glans will often not be able to withstand the stimulation, easily leading to a touch of ejaculation, premature ejaculation is inevitable.