We all have a love of beauty, if there are spots, acne, wrinkles on our face we want to get rid of them, so more and more friends choose laser beauty. But many friends do not know how to care after doing laser beauty. Dr. Huang Lining of Guangdong Dermatology Hospital reminds that if there is a lack of careful care after laser beauty, the effect will be greatly reduced, and there may be many side effects. The post-laser precautions we are talking about today all start with invasive laser treatment. The so-called invasive laser is simply a series of processes such as skin breakage, bleeding and crusting after laser treatment, which require strict post-operative care to prevent complications because of changes in skin tissue structure. I. Postoperative <4 hours: active anti-inflammation, prevention of infection, and promotion of repair 1. Postoperative inflammation is mainly manifested as redness, swelling, heat and pain reactions in the operated area, which usually disappear within 24 hours after surgery. In order to reduce the discomfort caused by the inflammatory reaction, a cold compress mask or ice pack will generally be used for about 30 minutes immediately after surgery to reduce the inflammation. If the inflammatory response is severe, topical weak hormone ointment, oral glucocorticoids or non-steroidal anti-inflammatory drugs can be used under medical supervision. Reducing the inflammatory response in the early postoperative period not only reduces postoperative discomfort, but also has the potential to reduce post-inflammatory hyperpigmentation. Therefore, the recent postoperative period should actively reduce the inflammatory response. 2, prevention of infection: what is the most important thing after laser surgery? It is the prevention of infection! Under normal circumstances, the sebaceous membrane of the skin has a strong defense function, but within 4 hours after laser cosmetic surgery, the skin undergoing surgery has not re-formed part of its own defense mechanism. Therefore, this 4 hours is a dangerous period, easy to produce infection, must avoid entering the environment that may cause pollution. Also topical antibiotic ointment (such as aureomycin or erythromycin eye ointment) needs to be applied to the wounded area, these can effectively prevent the occurrence of infection. Topical antibiotics can be used continuously within three days after surgery. 3, moisturizing: after laser cosmetic surgery skin metabolism will be accelerated, the need for more water, so you should drink more water to maintain humidity. At the same time, because the normal sebaceous membrane structure of the skin has been destroyed, in order to help the skin to restore normal structural function as soon as possible, the use of medical grade sterile mask with growth factors (such as epidermal growth factor, fibroblast growth factor, etc.), collagen and other ingredients is very necessary. This type of mask has moisturizing function at the same time can promote the healing of the wound. However, it should be reminded that the post-operative skin care film must be medical grade skin care film, which is generally produced in accordance with the safety level of pharmaceutical production and undergoes strict bacterial testing and irritation testing and other related clinical tests. Those skin care films on the market that have not undergone rigorous testing and are used for daily care should not be used indiscriminately to prevent infection and contact dermatitis. We once saw a case where the patient used a daily skin care mask purchased in a supermarket for post-laser repair after fractional laser surgery, resulting in severe contact dermatitis and infection. Second, postoperative <72 hours: only simple skin cleaning, moisturizing, preventing infection, and promoting repair 1, cleaning: you cannot clean the skin as usual after laser cosmetic surgery, and generally speaking, you cannot clean the skin within 4 hours after surgery. It takes 4 hours for the skin to re-form its own protection mechanism after surgery. And this protective film is formed in an emergency situation and can only play the most basic protective role. Therefore, general cleansing is generally not allowed for 72 hours. If there is a need to cleanse the skin, a cleansing film can be used and applied to the skin to absorb dirt. Cleansing can only be performed 72 hours after surgery, but in terms of the choice of cleansing products, it is recommended that it is best not to use conventional cleansing products, but to choose medical skin care products that are free of additives and other possible irritants, preferably on the advice of the doctor. The use of cleansers with functions such as oil removal, scrubbing, fruit acids and deep purification is strictly prohibited. 2. Moisturize, prevent infection and promote repair: The skin barrier function is still not restored at this time, and topical antibiotics, growth factors and moisturizing film need to be used daily. Third, 72 hours-6 days after surgery: basic skin care, avoid stimulation The 3rd-6th day after surgery, you can use some moisturizing products appropriately. If you want the skin recovery process after laser surgery is not too much external stimulation, it is best to use only conservation restorative, therapeutic skin care products and creams, etc., and skin care products with certain efficacy such as whitening, antioxidants, etc., may have pharmacological ingredients, which are easy to stimulate the delicate skin that has just regrown, and these stimuli are likely to cause allergic reactions to the skin. In addition to making the skin infrared, if it causes inflammation, it may also trigger hyperpigmentation, making the skin tone darker or re-forming discoloration, which is not worth the loss. It is worth mentioning that although collagen helps to restore skin elasticity and re-glow, it does not necessarily mean that its use after laser surgery is beneficial or harmless. A small number of people have allergic reactions to collagen, so it should be used with caution. Fourth, postoperative > 6 days: cleaning, moisturizing, sun protection Six days after surgery, the skin barrier function gradually returns to normal, daily cleaning and moisturizing can gradually return to normal. Daily skin care products are best to use the daily post-laser care products recommended by doctors, which are less irritating and can better avoid the phenomenon of skin sensitivity after laser surgery. Sun protection: In order to avoid post-operative pigmentation, it is important to do a good job of sun protection after surgery. Wear a sun hat and an umbrella to protect against ultraviolet rays; choose a sunscreen with an appropriate sun protection factor, UVB sun protection index (SPF) > 20, UVA protection factor (PA) > ++, and should be reapplied once every 2 to 3 hours. Patients often ask if they can’t go out after laser. In fact, it is sufficient to avoid prolonged exposure to sunlight during the most intense hours of the day (10:00 am to 4:00 pm). Also, even if you stay indoors all day, it is important to wear sunscreen. Because indoor fluorescent tubes also emit UV rays, the intensity of UV rays received during a 10-hour stay indoors is equivalent to one hour outdoors. The correct way to apply sunscreen is to place a soybean or peanut-sized amount of sunscreen on your palm, draw a circle in your hand and then pat it on your face to avoid clogging your pores with sunscreen. Avoid bad habits and seek medical attention in time for adverse reactions.