The white marks left behind after laser scabbing are usually caused by partial loss of pigment in the treated area after laser treatment, and the specific length of recovery time varies from person to person. Laser can effectively get rid of pigmentation, and after the operation will generally scab, normal laser treatment scabs off after leaving a light pink trauma, and sometimes there will be a light white spots, is because of the laser action of the pigment loss caused by. Smaller area of pigment loss can be gradually recovered after 3-6 months, while a slightly larger area of pigment loss is generally irreversible, and can be treated by carbon dioxide laser attempts, the clinical effect is not good. It is recommended that patients who are willing to be treated should go to a regular medical institution in time and follow the advice of a specialist to standardize the treatment, so as to avoid adverse consequences.