When we talk about sensitive skin, we usually refer to a skin type that is prone to skin discomfort due to physical, chemical and mental stimuli. Unlike allergies, sensitive skin does not have a specific allergen, the biggest cause is a damaged skin barrier, so the slightest external stimulus can lead to sensitive discomfort, which may appear as fever, tingling, itching and tightness, and may also be accompanied by redness and flaking. Strictly speaking, sensitive skin is not a disease, but a subhealthy state of the skin, while allergy is a symptom, contact with allergens triggers redness, swelling, itching, pain and heat. The main manifestations of sensitive skin: 1, looks thin skin, easy to allergic, the face of the obvious red blood (dilated capillaries); 2, the skin is prone to redness, general temperature changes, too cold or too hot, the skin is prone to redness, heat; 3, easily stimulated by bad factors, seasonal changes and facial care products, usually attributed to genetic factors, but more often due to the use of hormone-based cosmetics led to become sensitive Sensitive skin. Sensitive skin is divided into primary and secondary. More than 70% of sensitive skin is secondary, including those caused by topical acne removal, whitening, anti-allergy drugs (such as hormone-containing creams, fruit acids, retinoic acid, etc.), inappropriate skin care (excessive cleansing, exfoliation, whitening and spot removal), post-laser surgery, etc. and hypersensitivity states associated with skin diseases. Whether primary or secondary sensitive skin, skin barrier damage is the key link in the development of sensitive skin. Every day, we can see a large number of young women suffering from various facial skin problems caused by damage to the skin barrier function in outpatient clinics. According to research, among the 1.3 billion people in China, nearly 1.1 billion people have sub-healthy facial skin, and about 400 million of them have damaged skin, are you one of them? Ever wondered why, in the end, our skin always has all kinds of problems? Let’s take a look at what the skin barrier is. Skin barrier system – the natural guardian of human skin Everyone’s skin surface actually has a natural skin barrier system, which consists of the human epidermal stratum corneum and sebaceous membrane. The stratum corneum is the outermost part of the epidermis, and skin moisture retention is determined by the water content of the stratum corneum, which means that whether our skin is dry or not depends on this layer. In the stratum corneum, keratinocytes and intercellular lipids are arranged in a brick wall-like structure, forming a stable skin structure that protects the skin’s barrier function, effectively preventing excessive evaporation of water from the body while preventing the invasion of bacteria or foreign substances into the body. In a nutshell, the skin barrier consists of the most superficial layer of the skin, which is the surface of the skin visible to the naked eye. Its function is to keep the skin moist and smooth, and to shield it from harmful substances. Most skin problems stem from a damaged skin barrier. Healthy, undamaged skin looks and feels smooth, soft, full and definitely not dry. But when the skin barrier is damaged, the skin will be as dry, rough and dull as if it has been dehydrated. Closed air-conditioned environment, increasingly serious environmental pollution, frequent face washing and bathing, listening to false and exaggerated advertisements and indiscriminate use of skin care products and salon products of unknown origin …… all kinds of problems will cause damage to the skin barrier, when the barrier is damaged, the skin will quickly start self-repair, but with the passage of time, the self-repair speed of the skin will gradually Once the skin barrier is damaged, it cannot lock moisture internally and cannot resist microorganisms and chemicals externally, leading to a series of vicious cycles. The skin becomes drier and drier, resulting in various discomforts. So how to repair the skin barrier? 1, master the correct knowledge of skin care: this is the focus of the focus, as the so-called knowledge changes fate, efforts to learn scientific skin knowledge, advocate scientific skin care methods, realistic, do not listen to cosmetic advertising, cosmetic salesman’s lull. 2, the correct cleansing: no matter what type of skin you have, to the correct cleansing, try to use mild types of cleansing products, such as gel cleansers with less foam, be sure to avoid strong oil control and cleaning foam-type cleansers, soap-based cleansing products, hand soap, etc. should also be avoided as much as possible. Because strong cleaning products will quietly destroy your skin barrier. 3, reasonable exfoliation: not all skin types are suitable for exfoliation, it is not recommended to blindly exfoliate. 4.Do not use irritating products: regardless of whether your skin barrier is damaged or not, you should consciously avoid using strong irritating products (such as alcohol, fragrance, dodecyl sulfate-based irritating detergents, etc.) for a long time ~ because this will damage the healthy skin barrier and let the damaged skin barrier enter the vicious cycle of 3 steps again (i.e. barrier damage -> inflammation-causing substances enter -> skin inflammation -> barrier damage) (….) 5, auxiliary skin care products: skin care products containing natural moisturizing factors can not only help the skin retain moisture without stimulation, but also promote the repair of the stratum corneum Jun. Then, use some creams containing natural plant oils, they can lock the moisture in the skin, but also provide free fatty acids for the skin to improve the speed of skin barrier repair. In addition, make sure to do a good job of sun protection, choose a mild and non-irritating sunscreen, and apply it carefully every day before going out. At the same time, pay attention to makeup removal, try to choose makeup remover or makeup remover oil, if possible, it is recommended to try to use natural plant oils, 6, self-repair: the skin’s self-repair process is slow, and the speed varies from person to person depending on age, generally speaking, about 20 years old 3-5 months can slowly recover, more than 30 years old mature skin, it will take at least half a year or more time, in short, this is a very The process requires a lot of patience.