The foreskin does not affect erection. Generally the foreskin is the penile skin covering the surface of the glans, which mainly plays the role of protecting the penis and glans, and the foreskin does not contain nerves and blood vessels that affect erection. Usually, for normal male compatriots, penile erection is a physiological process coordinated by the whole body multi-system, which is caused by the brain neuroendocrine regulation, psychological effects and other factors. And if the patient is belong to the state of slight foreskin, it will not affect the erection, at the same time, it should be noted that the male penis erection may be due to the influence of the circumcision, resulting in an abnormal erection pain, affecting the normal sex life, sex life pain. For patients with excessive foreskin, surgical treatment can be taken to remove the excessive foreskin through surgery, making the glans fully exposed, which is conducive to the restoration of normal male sexual function. In addition, the long foreskin is also easy to cause the formation of foreskin dirt in the cavity of the foreskin, leading to the foreskin glans dermatitis, should be treated as soon as possible surgery, not to delay the best time for treatment.