There is no most effective way to repair scars, and scar repair needs to be based on the size of the scar as well as its severity. For scars with mild symptoms and a small area, they can be repaired with topical medication. For scars with serious symptoms and large areas, they can be repaired by injections or lasers. 1. Mild scars: For scars that are relatively small in size and have formed over a relatively short period of time, you can use sodium heparin sodium allantoin gel or silicone gel to treat them. Usually stick to the use of 3 months to 6 months, you can see some results. 2. Severe scars: For scars that are relatively large in size, have been around for a long time, and look reddish in color and rich in blood vessels, they can be treated by injecting glucocorticosteroids, such as cotrimoxazole and trimethoprim acetate. It can also be repaired by laser. For patients with scars, if they are self-conscious of the aesthetic impact, it is recommended to go to a regular hospital or institution for standardized treatment.