The length of circumcision is 0.5 ~ 0.8cm distal to the coronal sulcus to circumcise the foreskin. Before circumcision, pay attention to the cleanliness of the excision site, maintain a light diet, avoid spicy and stimulating food. Before the operation, if there is circumcision or glans inflammation, you need to take the appropriate oral medication for treatment, and after the symptoms disappear, then circumcision surgery. Precautions after circumcision surgery: rest for about a week after the operation, do not stand for a long time and sit for a long time; change the medicine two to three days after the operation, keep the incision clean and clean; do not eat spicy and stimulating food after the operation; prohibit sexual activities such as coitus and masturbation for 30 days after the operation, and pay attention to the healing of the incision. If you want to undergo circumcision, please choose a regular hospital.