Scar is a collective name for the appearance morphology and histopathological changes of normal tissues caused by various traumas, and it is an inevitable product of the repair process of human body. When the growth of scar exceeds a certain limit, various complications will occur, just like the destruction of appearance or functional activity disorder, which brings great pain and suffering to the patients, especially the scar of burns, scalds and serious trauma sequelae. As for laser scar removal (commonly known as scars), it mainly depends on the size of the scar or the extent of the scar, and one is what caused the scar. If it is a scratch-like scar, a very shallow scar, the treatment time will be shorter. For example, we treat the scar in 3 to 5 sessions so that the scar does not look too different from the surrounding tissue. If the scar is a depressed scar, stretch mark or slightly raised, then the treatment time for this case will be longer, for example, about 8-10 times, so that the scar can achieve such a process of fading, but of course the treatment time for scar is related to each person’s body type. For example, some people are keloid, it is not recommended to do this laser treatment, their own repair ability is very weak, in this case, the interval between each treatment will be long, some people can be in 3 months, maybe this case should be carried out 4 months, deeper scars will need 8-10 times.