Skin allergy is a kind of skin reaction to external stimulation products, when allergens contact the body, prompting the body to produce the corresponding antibodies, triggering the antigen antibody reaction, its severity varies, the common performance of the skin redness, itching, red blood, dry flaking, blisters, small bumps red dots, stinging, burning and tightness and other phenomena. When these conditions occur, you need to choose your daily care cosmetics carefully and pay more attention to them in your life. This can be a good way to improve skin allergies. First, the use of irritating cleansers Many people use cleansers that contain excessively irritating cleaning ingredients, which can easily cause the product to be too irritating to the skin and cause damage to the sebaceous membrane and the lipids of the stratum corneum after use. In the long run, the skin barrier function is damaged and the vicious cycle begins: the skin’s protective capacity decreases leading to the entry of inflammatory substances; inflammation causes itching and further reduction of the skin barrier. The result is that the skin cannot retain moisture, and skin dehydration further causes skin inflammation, itching and dryness which in turn causes the formation of sensitive skin. So, for the face washing countermeasures, there are the following points to note: ① choose mild cleansing products; ② do not use too hot water to wash your face for a long time; ③ avoid frequent facial treatments in the beauty salon; Second, not moisturizing, excessive skin dryness Sensitive skin, a large part of the population is dry skin (of course, oily skin also has a sensitive type), for dry skin, the development of sensitive skin The possibility is great, in the cold environment, the stratum corneum brittle enhanced, dryness caused by itching, itching caused by scratching easy to destroy the stratum corneum, but also easy to lead to damage to the barrier function. Thus moisturizing is the first need of skin care. We need to do a good job of moisturizing the skin in a timely manner according to the changes in the external environment. But the reality is, after using so many moisturizers, why doesn’t the skin become a little more hydrated? That is because the moisturizers you use are lacking lipid repair ingredients and natural moisturizing factors in addition to traditional moisturizing ingredients, such as common lipid repair ingredients ceramides, fatty acids or cholesterol, natural moisturizing factors sodium lactate, PCA-sodium, urea and so on. In particular, ceramides, fatty acids and cholesterol are three ingredients that are necessary to build a healthy skin barrier. Therefore, use a moisturizer or related product at least 2 times a day for dry skin. If you are in an air-conditioned environment, you can use an air humidifier. If skin sensitivity is severe, always carry a product containing a spa spray for skin hydration. In other dry environments, such as air-conditioned environments, flight journeys are dry environments, some alpine and high altitude areas, remember to make sure to moisturize the skin. Three, no sunscreen Sunscreen is a daily necessity, because the sun not only causes your darkening, sunburn, the cause of aging, but also the sun will destroy the barrier function of the skin. Sunlight can aggravate dry skin, UV rays inhibit the growth of skin enzymes that produce the main component of the skin, thus destroying the skin’s function of locking in water. As a result, sun-damaged skin is scaly and flaky, and this damage can lead to further dryness and flaking. Sun exposure also reduces the amount of hyaluronic acid in the skin. Hyaluronic acid channels water into the skin, which becomes full and maintains a certain volume. Sun-damaged skin tends to lose volume, partly due to the loss of hyaluronic acid. In addition, the sun can cause your skin to darken, sunburn, and age. Therefore, it is important to make sure that you are protected from the sun. This is especially true for sensitive skin. If you are worried about chemical sunscreens, you can use sunscreen products with physical sunscreens. Fourth, excessive skin care Cosmetic brands hate to empty your silver at once: educate you to use a variety of products in conjunction to be effective. At the same time a variety of new types of products have been developed that further increase the number of steps in skin care, adding up to the original steps and increasing the possible harmfulness of some of these ingredients. For example, when it comes to preservatives, it is equivalent to applying several layers of products, so the total amount of preservatives on the face has increased, and preservatives that were not a problem under normal dosage have been overlapped, resulting in excessive use, thus making it necessary to pay attention to safety issues. On the other hand, some students like to use various brands of products to use together, such as A brand of water, B brand of essence, C brand of day cream, this combination is generally in accordance with the best products of each brand to choose, the ideal is good. The ideal is good, but the reality is that it does not always work, and in turn may not be good for the skin. The ingredients in a brand of products are already quite a lot, several brands of products, the ingredients used vary, so many ingredients together with the superposition, not only how the effect will change, just the types of these ingredients, the skin does not need the kind of quite a lot. With dozens of ingredients on your face, who knows what will happen? So, streamlining your skin care routine is an important skin care principle to prevent turning into sensitive skin. Don’t spend the money, the face did not become good but tossed into the bad, it’s not worth it. Five, the use of hormone-containing skin care products Some skin care products secretly added hormone products, can temporarily play the role of shrinking blood vessels, control the inflammatory response, on sensitive skin seems to be very effective. The problem skin will also feel better soon after using products containing hormones. However, after stopping the use of hormonal skin care products, the condition will relapse and other serious skin problems such as vasodilation, rash, redness, and swelling will appear. The skin barrier function is also damaged by the use of hormonal cosmetics and sensitive skin ensues. Therefore, be sure that the products you use are regular products. Avoid using hormone-containing skin care products. The actual fact is that you can do photorejuvenation treatment for sensitive skin There are two main principles of photorejuvenation treatment, biostimulation and photothermolysis principles. The main reason for this is to make the internal molecular structure of the collagen and elastic fibers of the dermis change chemically and restore elasticity. In addition, the photothermal effect produced by intense pulsed light can enhance vascular function and improve circulation, effectively improving sensitive skin while also reducing pores and eliminating superficial wrinkles.