Scar tissue is an inevitable product of human trauma repair. Broadly speaking, there is no wound healing without scar tissue. After all wounds are properly treated (including aseptic technique, debridement, incision and suture or tissue transplantation, etc. ), may also produce a slight scar. Cosmetic suture is an effective suture method to minimize scars. Because the needle and thread of cosmetic suture are non-invasive suture, there will be no traces of "centipede foot" after suture removal, and generally there will be small or even linear traces. At present, it is suggested to use special anti-scar drugs for half a year after stitches are removed, which can improve the appearance of scars. In the later stage, laser and other treatment measures can be used to remove the scars formed after trauma to the maximum extent.