It is understood that cosmetic allergies are a relatively common occurrence in dermatology, with about 10 percent of patients seeking treatment for skin allergies. The official implementation of the new national standard on cosmetic labeling, “General Labeling of Consumer Products”, is very beneficial to consumers. By standardizing the labeling of ingredients, people will pay more attention to the ingredients added to the products when replacing cosmetics and maintenance products, and consciously identify allergic ingredients, which will greatly reduce the phenomenon of cosmetic allergies. Keep in mind the results of the skin patch test Sensitive skin is prone to dryness, redness, blotchiness, eye swelling, peeling or acne due to diet, emotions and the cosmetics and care products used. It is recommended that people with sensitive skin should first conduct skin patch tests to learn about the ingredients that cause skin allergies through professional skin tests, and then keep the test results in mind to selectively avoid foods and cosmetics that contain these ingredients in order to effectively control and reduce the allergy phenomenon. Winter anti-allergy single hydration effect is good For people with allergic skin, the most difficult to pass is winter. Dry season skin texture is more fragile, and resistance is very poor, and the moisture on the surface of the skin evaporates faster. When choosing a new care product or cosmetic, read the product ingredients carefully and make sure that the product does not contain allergic ingredients, then apply an appropriate amount of the product behind your ear or on the flexor side of your forearm for a test, if there is no redness, swelling, peeling or tingling after 2-3 days before you can use it. Do not simply believe in the “anti-allergy ingredients” on the product label. Finally, people should not mistake the use of natural plants for maintenance is the healthiest and safest, in fact, like lemon juice may appear phototoxic reactions, for some allergic people, directly apply lemon juice on the face and other sun-exposed parts can lead to facial redness, swelling, and even blisters. So for people with allergic skin, special caution is needed when making your own mask at home.