”Did you get stuck in the powder today?” “Did your face peel today”, it seems that the winter skin has been a relatively “fidgety” state. Why does dry skin occur in winter, and what can we do about dry skin in winter? Today, let’s first understand why the skin is dry in winter: a. Skin itself factors The outermost layer of the skin surface, which is often called the stratum corneum, contains natural moisturizing factors (amino acids, lactates and sugars) that can maintain a certain water content of the skin and maintain the moist skin, and she also has the function of water absorption and barrier protection. Normal skin stratum corneum usually contains 10-30% water, maintaining skin softness and elasticity. In winter, the blood vessels on the surface of the skin are in a contracted state, the sebaceous membrane secretion is reduced, and the moisture content of the stratum corneum will be reduced; in addition, ageing is also an important reason for dry skin, because as we grow older, the moisture content of the stratum corneum of the skin will gradually decrease, and when the moisture content of the stratum corneum of the skin is less than 10%, the skin will appear dry, taut, rough and flaky. Second, environmental factors Winter weather is dry, the water content in the air is relatively low, the skin in the case of less water content will naturally be dry; winter outdoor more windy and due to the cold many families will use air conditioning, which also accelerates the body moisture loss. Winter weather is cold, everyone will wrap themselves tightly, clothes may rub against each other to generate static electricity, which also aggravates one of the factors of dry skin.