1.Shower one day before the surgery, wash the penis and the surrounding skin, try to remove the dirt inside the foreskin and shave the pubic hair; 2.Avoid drinking alcohol, eating seafood, mutton, fish and shrimp and other hairy products and chili peppers and other irritating foods one day before the surgery; 3.Wear loose sweat pants and loose underwear as much as possible when you come to the hospital for surgery; 4.Stop taking aspirin and other anticoagulant drugs one week before the surgery; 5.Have at least one relative accompany you during the surgery.