Skin sensitivity is the destruction of the skin barrier caused by various reasons, so that the skin is very sensitive to external (such as wind, temperature changes, etc.) stimuli, mainly manifested as redness of the skin, burning, tingling or itching sensation. Skin allergies are skin allergies to certain substances such as hair dyes, or the body of a drug or food allergies, manifested as rashes, itching. The treatment for the former is to maintain a good skin barrier, and the latter is to fight allergies! Zhang Hao, Department of Dermatology, Affiliated Hospital of Sichuan North Medical College The skin has a complex structure, the outermost layer of the skin is the stratum corneum, which has a layer of emulsified membrane composed of sweat and sebum to provide protection for the body! We need to pay attention to protect this membrane and protect this barrier of the skin. Excessive washing, excessive rubbing, use of improper cosmetics, use of alkaline soaps, and environmental pollution can all damage the barrier. Women who love beauty should be especially careful, or their face will easily become sensitive skin! Some young people, especially young and middle-aged women, overuse of cosmetics and over-cleaning of the face is a major cause of sensitive skin! Cosmetics include foundation, blush, loose powder; eye cream, eye shadow, eye liner, mascara; lipstick, lip gloss; sunscreen, isolation cream; skin care milk, cream; serum, serum; perfume; cleansing cosmetics such as make-up remover, make-up remover oil, make-up remover, cleanser; moisturizer, cleansing water, nourishing water and so on. Imagine if a cosmetic contains ten chemicals, how many chemicals will be applied to the face in a day! Then again, the more you apply during the day, the more you need to cleanse at night. The consequence of this is that the emulsifying film on the surface of the skin is also removed, thus destroying the skin’s barrier. In the long run, how can facial skin not be allergic? Instead of using topical medications for sensitive skin, first apply medical skin care products, while applying warm water to the face or getting a cold sprayer to mist the face! Sometimes just using olive oil is fine! In short, the simpler the better to give your skin a rest and restore its normalcy! Professionally speaking: restoring the skin’s barrier function! Medical skin care products are different from general cosmetics, mainly in: 1, no fragrance; 2, no preservatives, or the use of preservatives that are not easily sensitized; 3, containing less irritating surfactants; 4, the production process is more stringent requirements, after a certain amount of clinical examination before market. Medical skin care products for sensitive skin use. At present, there are many medical skin care products in China.