Some people think that prepuce and circumcision do not prevent sexual life and fertility, so it is not a genital disease. In fact, this view is not scientific. This is because, whether it is circumcision or prepuce, there are certain harmful effects on the human body. 1, hinder the development of the penis, affecting the harmony of sexual life: circumcision will affect the growth and development of the penis, in adolescence due to the penis head is tightly wrapped by the foreskin, do not get the due stimulation of the outside world, the development of the penis head is greatly constrained, resulting in the development of mature sex organs, the circumference of the crown of the penis head is obviously small, affecting sexual pleasure. Adults will be due to the foreskin is too long or prepuce, affecting normal sex life. Especially for men whose foreskin caliber is too small, the foreskin cannot be recovered by turning up, and the foreskin is stuck tightly in the coronal sulcus, becoming an embedded prepuce, which is painful. 2, the foreskin makes the penis inflammation: circumcision or foreskin is too long, so that the secretions of the sebaceous glands within the foreskin can not be discharged, sebum and urine precipitates synthesized cheese-like odor “foreskin scale”. The foreskin scale is suitable for bacterial growth, so it can cause inflammation of the penis head and foreskin, and even cause urinary tract infections. 3, circumcision damage kidney function: due to penile inflammation, can cause urethral or front urethral narrowing, resulting in urinary difficulties. Long-term urination difficulties, the function of the kidneys will be damaged. 4.The risk of cancer caused by long foreskin: long foreskin and circumcision may induce penile cancer. According to modern scientific research, prepuce is a carcinogenic substance. According to the survey, 85%-95% of penile cancer patients are circumcised or circumcised. 5.Easy to cause gynecological diseases in sexual partners: Circumcision is the main source and important factor leading to repeated cross-infection of male and female reproductive diseases. Circumcision and prepuce not only affect one’s own health, but also bring foreskin scale into the vagina if one has intercourse with one’s wife, which will stimulate the uterus and induce cervical cancer.