At present, new cosmetic lasers and photons are being widely used in dermatology. The new lasers have the advantages of high safety, less trauma, less bleeding, less pain, etc. However, the laser may affect the physiological function of the skin and cause damage to the normal structure of the skin during the treatment. How to prevent post-laser complications and promote the recovery of skin physiological functions needs to be given sufficient attention. In order to cure the disease, promote skin regeneration and repair, prevent complications and achieve cosmetic results, it is necessary to pay attention to postoperative skin care. 1, reduce the postoperative skin reaction laser, photon surgery according to the immediate reaction of the skin cold wet compress or ice wrapped in a towel ice compress laser skin, such as after treatment skin color whitening, ice time is about 30min. 2.Prevent infection and reduce inflammatory reaction In order to prevent skin infection after surgery, if necessary, use gentamicin injection or mupirocin ointment (Bactrim), etc. thinly applied to the trauma, if the treatment area is large and the inflammatory reaction is heavy, you can take prednisone 10mg orally, 3 times a day for 3 d, to strengthen the anti-inflammatory effect. 3.Promote wound healing Basic fibroblast growth factor (BFGF) is an important mitogenic factor. Its main biological roles are: promoting neovascularization; promoting wound healing and tissue repair; promoting tissue regeneration and participating in nerve regeneration. It has been reported to promote the healing of burn wounds and improve the healing quality, and can be used in conjunction with autologous epidermal transplantation for the treatment of vitiligo. Therefore, if the epidermis is broken after laser surgery, BFGF can be sprayed on the wound to promote healing. 4, promote skin regeneration and repair As the laser can varying degrees of damage to the skin sebaceous membrane, stratum corneum, brick wall structure, water channel protein, basal layer and other skin structures, so after laser surgery should promote skin regeneration and repair, in the treatment of 3 to 6 months, the use of suitable medical skin care products for effective skin care (moisturizing, sunscreen, reduce local skin erythema, stinging, burning and other inflammatory reactions, It is essential to repair damaged skin. Medical skin care products are different from traditional cosmetics, and are special cosmetics between drugs and cosmetics, which have both the auxiliary therapeutic effect of drugs and the characteristics of cosmetics, such as safety, stability, comfort and effectiveness. 5, sunscreen 1) external sunscreen: because after laser surgery is easy to cause pigmentation. Therefore, it is necessary to use sunscreen products with high safety and good sun protection effect. The sunscreens on the market are divided into chemical UV absorbers, physical UV shielding agents, and biological sunscreens. Because the physical sunscreen mainly through the reflection, scattering ultraviolet radiation to achieve the purpose of sun protection, the composition is mainly: kaolin, titanium dioxide, zinc oxide, talcum powder, etc.. They are relatively mild, non-toxic, not absorbed by the skin, and not easy to cause allergies. Therefore, physical sunscreens are preferred after laser surgery. The sunscreen chosen after laser surgery should be a physical sunscreen with uVB sunscreen (SPF) > 30; UvA protection factor (PFA) > +++; and a larger R index. 2) Wear a sun hat, cotton long-sleeved top and long pants, and a sunshade. 3) Avoid prolonged exposure to sunlight during the most intense hours of the day (10:00 to 16:00). 6, diet The role of diet on skin repair is not to be ignored. Protein, fat and sugar are essential nutrients for the skin, vitamins and trace elements can affect the normal metabolism and physiological functions of the skin, such as: B vitamins, folic acid can increase pigmentation: vitamin C, vitamin A can make pigmentation decreases; certain trace elements, such as copper can promote melanin production. Therefore, after laser surgery should avoid eating foods containing copper and B vitamins, and eat less spicy food. And should eat more vitamin c, vitamin A rich food. For example, eat more fruits, vegetables, and foods containing iron, zinc and other trace elements such as lean meat, fish, beans, cabbage, radish, etc., and pay attention to drinking more water to promote skin repair.