When summer comes, in addition to strong sun exposure, there are also hot and humid problems. These environmental factors will easily cause skin problems. Therefore, the market demand for facial mask has been high. In daily life, how often do you need to apply a facial mask? What problems need to be paid attention to? Li Li, a professor of Dermatology and chief physician of West China Hospital of Sichuan University and a consultant of dermatologist branch of Chinese Medical Association, was invited to share relevant knowledge with netizens. Li Li said that it is absolutely unnecessary for normal skin to apply a facial mask in the morning and evening. In general, once every three days or so is enough. So, under what circumstances do you need to stick a facial mask every day? Li Li pointed out that after medical and aesthetic surgery, such as photoelectric therapy; Or there are skin diseases, such as rosacea, hormone dependent dermatitis, allergic diseases, etc. you may need to apply the facial mask once a day. After the inflammation is relieved, it is recommended to restore to the frequency of once every three days. In case that hormones and antibiotics are illegally added to the facial mask, how should they be found in time? Li Li introduced two methods for identification. The first method is to pay attention to the app of the State Food and drug administration, and issue relevant reports every quarter to list the illegal facial mask. The second method is to focus on the use effect. If you use a certain facial mask, the effect is very good. After stopping using it, you will have problems such as skin intolerance, skin itching, dry skin, red skin, etc. but once you use this facial mask again, the symptoms will be eliminated immediately. You must be alert to this situation. There may be added hormones in it. In another case, if you use a certain facial mask, the treatment effect for acne is very good, reaching an immediate level, you should doubt whether there are antibiotics in it. "If antibiotics or hormones are added, they must be stopped immediately. If the situation is serious, they must go to the relevant departments of the hospital for regular treatment." Li Li emphasized. (outlook new era)