Patients with facial allergies are increasingly being seen in dermatology clinics, with nearly 50% of all outpatient visits being for facial skin problems. Why is this happening? We designed a detailed questionnaire and tracked each patient’s medical history for nearly three years to get first-hand information and do data analysis. There are various causes, but there are a few key points: 1. Those who frequent beauty salons are prone to skin sensitivity. Excessive exfoliation, excessive moisturizing, and some fast whitening products can damage the skin barrier, resulting in reduced resistance to the outside world and sensitivity to external stimuli. 2, use cosmetics with obvious curative effects, follow the feeling and buy cosmetics that can be seen in the short term. Some cosmetics are used for about a week, the skin becomes white and translucent, the black spots become lighter, and the skin is delicate. This kind of cosmetics is the most harmful to the skin. 3, excessive exfoliation, clean skin. Some people repeatedly wash their faces, repeatedly remove makeup, and often use cosmetics that exfoliate the skin, so that the protective layer of the skin is reduced or lose its proper protective function. 4, the use of heavy metals exceed the standard products. Some small manufacturers, in order to meet the customer’s demand for quick results, add mercury in cosmetics that exceeds the national standard by hundreds of times, and the results can be seen in just a few days. The use of such cosmetics light skin formation of melanosis, long-term prone to liver and kidney function abnormalities, and even death. 5, the use of cosmetics with complex ingredients, some cosmetic ingredients reach more than 50 kinds of raw materials, a page full of instructions, how can the skin absorb? Some even add chemical exfoliating agents to quickly destroy the skin’s keratin. 6, the use of cosmetics containing hormones. Some bad manufacturers, adding corticosteroids inside cosmetics, the use of the efficacy of clear, the skin becomes delicate. Long-term use causes hormonal dermatitis, resulting in thinning of the skin, vasodilation, hair follicle infection, etc. 7, excessive use of facial masks. These two years are mask fever, many manufacturers are generating masks. Unsuitable masks have a greater impact on the skin, or frequent use, or each use for too long, will have certain side effects on the skin. How the skin reaction according to determine the cosmetics have harm to the skin? 1, short-term use for about a week and a month, chloasma or dark spots significantly lighten and disappear, if this happens, heavy metal mercury is often added inside. 2.After using for a period of time, the skin becomes translucent white and delicate, this kind of cosmetics often add keratin exfoliating agent. 3.After use, the skin becomes bright and delicate, and as the use time grows, the skin becomes thinner and blood vessels gradually appear, and after discontinuing use, the skin flushing and inflammatory reaction is obvious, this kind of cosmetics often contains hormones. How to deal with skin allergy? 1. Stop using all cosmetics. In the allergic state, even products that are not allergic may cause irritation to the skin. 2.If allergy symptoms persist for a month, make sure to do patch test to find the ingredients of cosmetics that cause skin sensitivity. 3.Choose appropriate topical medications and anti-inflammatory and moisturizing skin care products. The more single ingredients, the less impact on the skin. 4.Go to a regular dermatologist in time, don’t change cosmetics frequently, physical therapy is also a key treatment countermeasure. 5, every day with green tea water to do open cold wet compress, each time fifteen minutes, twice a day. Wet compress time should not be too long, wet compress should not be too many times.