Laser scar removal uses the instantaneous high heat generated by the laser spot to sweep away the scars within the scanning area, while the laser spot is formed by the focus of the laser and the scanning is done by using the graphic generator. Its scar removal effect is relatively good and is suitable for acne scars, keloid scars and depressed scars. However, keloid scars have a slow laser treatment effect and belong to the types of scars that are currently difficult to treat. In the early congestion period, redness removal laser can be used to control its scar proliferation, and in the later stage, exploitation fractional laser can be used to remove scars, which requires insisting on repeated and multiple treatments. As for acne scars and superficial depressed traumatic scars, the treatment effect is better, and the ideal effect can be achieved in 3-6 times in general. In addition, scar removal requires protection of the trauma surface, oral anti-inflammatory drugs, external anti-inflammatory drops and ointments if necessary, to promote the repair of the trauma surface, reduce inflammation, and reduce the proliferation of scar tissue. Generally, patients need to take antimicrobials for three days, but if the trauma is larger the time needed to take medication should be longer accordingly. At the same time, the scar skin should be allowed to fall off on its own, not forcibly removed, and avoid the stimulation of sunlight and wind and sand after the scar skin falls off.