Generally speaking, for people who want not to leave scars after the nose knocked and stitched, they should pay attention to the wound care, and they can also use medicines and surgery to get rid of scars if necessary, but it is not guaranteed that no scars will be left. 1. Wound care: people who have been stitched up after a nose injury should pay attention to keeping the wound area clean and dry, as well as regular medication changes for the wound, which is conducive to not leaving scars. 2. Drugs: For this kind of people, you can use vitamin A ointment to apply, which is conducive to the recovery of the wound and does not leave scars. For people who already have scars, you can use scar removal ointment, such as compound heparin sodium allantoin gel, for scar removal treatment. 3. Surgery: For people with scars, laser surgery can be used to remove scars. Whether or not a scar remains after suturing is mainly related to the degree of initial damage, so for people with the above needs, it is recommended to consult a professional doctor.