Whether to leave a scar or not is related to personal skin recovery. Of course, the infection of the wound is also related to the size of the suture, but people who are easy to leave scars cannot avoid it. When the wound is long, move your mouth as little as possible, keep the wound clean and dry, and do not need to use anti-inflammatory drugs when the swelling and pain are useless. Try to make the wound exposed and ventilated, and don't cover it. However, you are still young, and four stitches is not a big injury. Even if you leave a scar, it will become inconspicuous with age.