With the development of laser technology, burn scars, trauma scars, hyperplastic scars, acne scars are no longer as annoying as they were before, and CO2 fractional lasers have helped a large number of patients all over the world to get back their beauty and self-confidence. So, what is fractional laser? Fractional laser is a technology, the real meaning of fractional laser is to emit countless hair-thin, arranged in a matrix on the skin, which can directly penetrate into the dermis layer, vaporize the tissues at the wrinkles or scars in an instant and send out a strong signal to synthesize collagen, which will initiate a series of skin reactions such as tissue repair and collagen rearrangement. Normal skin is preserved between the holes, and through the role of the “bridge”, the lateral repair mechanism is activated, accelerating the skin’s recovery, the epidermis will be completely healed within 8 hours, the skin will return to its normal appearance in 3-6 days, and the internal regeneration of collagen can be up to 6 months, or even 6 years. The theory of this technology was first proposed by Dr. Anderson, the founder of the foundation of laser theory of Harvard University’s Wellman Laboratory, and then applied in the clinic, which is welcomed by the majority of patients because of its increased efficacy under the premise of not increasing the healing time. Second, what is the real fractional? Only the fractional technology with selectable spot diameter, selectable treatment depth, selectable density and selectable treatment energy at the same time is the real fractional. Only the fractional laser that meets such conditions can meet the personalized treatment needs of patients. Third, CO2 fractional laser is the gold standard for scar treatment Against this background: for disfiguring and disabling scars, despite traditional treatment with professional wound care and adjuvant therapy, a common problem is unsatisfactory cosmetic results, limitation of motor function as well as symptoms such as pain, itching, etc. The emergence of peeling fractional laser in the past 10 years has made it possible for patients to have their scars treated in the same way. The emergence of exfoliative fractional photothermal technology and its application to trauma scar treatment in the last decade has brought about a major breakthrough in the functional repair and cosmetic improvement of patients, but this treatment has not yet been widely used. In order to investigate the importance of fractional laser skin reconstruction for scar treatment, Dr. Anderson, Professor and Director of the Wellman Center for Photomedicine at Harvard Medical School and creator of the three major theories of cosmetic lasers, led a group of eight experienced scientists to investigate the importance of fractional laser skin reconstruction in the treatment of scarring. Professor Anderson led 8 experienced dermatologists and plastic surgeons over a period of 2 years, summarized a lot of clinical experience, and completed the consensus on scar treatment: scar laser treatment, especially CO2 fractional laser treatment is a very effective means of comprehensive treatment of traumatic scars. Existing scar treatment specifications should routinely include fractional skin reconstruction techniques. Key points include: 1. Skin reconstruction of traumatic scars with ablative fractional lasers provides a sustained and significant improvement in function, in addition to improving appearance. 2, The exfoliative CO2 fractional laser is more effective than other laser techniques for treatment. This is mainly due to the fact that the Fractional CO2 laser penetrates deeper into hyperplastic and constrictive scars, coagulates the surrounding tissue and induces a stronger remodeling response. Fractional lasers penetrate deeper into hyperplastic and contractile scars, coagulating the surrounding tissue as well as causing a stronger remodeling response. 3. Laser therapy, especially Fractional CO2 lasers, will play a more important role in scar repair, including the possibility of early intervention to avoid atrophy and aid in wound healing. What problems can fractional laser mainly solve? 1, acne scars, surgical scars; 2, pigmented lesions, such as age spots; 3, skin rejuvenation, wrinkle removal, pore refinement; 4, stretch marks, swelling lines; 5, facial tightening and lifting.