Every girl wants her face to be clean and white, but skin conditions such as acne often leave scars. Fractional laser, a scar fading technology developed by the aesthetic medicine industry, has helped many patients to solve their troubles. What are the main symptoms for which this technology is used and what is its principle? Fractional laser is a widely popular cosmetic dermatology technology that has emerged in the global skin community in the last two years. Compared with traditional laser treatment methods, it is more powerful and can reach the deep dermis of human facial skin, stimulate the repair of damaged dermal tissues, and make the dermis produce more collagen and rearrange it, so as to achieve skin rejuvenation effect. At the same time, it also has small side effects, short recovery time and remarkable effect. Fractional laser is mainly applied to eyelids, crow’s feet and other fine lines around the eyes, the removal of dry lines, to improve the face and forehead wrinkles, joint folds and stretch marks; in the removal of scars, especially for hyperplastic scars, acne scars, the treatment effect is more obvious. The hospital once admitted a 23-year-old female acne scar patient, after 4 fractional laser treatments, the acne scars on her face reduced and lightened. Fractional laser can formulate personalized treatment plans according to individual needs, and the diameter and depth of the microporous holes can be adjusted, and at present, only the treatment range of fractional laser can be adjusted from 5% to 100%. Special reminder, for the treatment and repair of acne, flat warts, pigmented spots, facial sensitive skin, not only to use a series of medication, at the same time through internal regulation and external control. Patients should do a good job of sun protection during acne, because a lot of outdoor ultraviolet rays will make skin pigment accumulation and precipitation, so that the color of the acne marks is deeper and heavier, and this phenomenon occurs for a long time, it will make it more difficult to get rid of acne marks. When patients do the treatment to get rid of scars, it is best to choose a regular and authoritative professional medical institution to reduce the risk.