1, warmth: the skin is a natural barrier between the human body and the outside world, with the regulation of body temperature, secretion and excretion and feel the role. Winter temperatures in northern regions are often below zero, if we do not pay attention to the warmth of clothing, in the low ambient temperature of the human body in order to maintain body temperature, the skin in the capillaries will contract in order to reduce the amount of circulating blood in the skin to reduce the skin heat dissipation, reduce the secretion and excretion of skin glands. Long-term down the skin does not get enough nutrition, the skin metabolism of waste can not be fully excreted, coupled with sweat glands, sebaceous gland secretion is reduced, so that dry skin is easy to chafe. Due to human hands, feet, ears in the end of blood circulation, and long-term exposure, so the most vulnerable to frostbite. Often many young people love the United States because of thin clothing, especially underwear tight legs elastic pants or jeans, resulting in the lower extremities of the skin because of low temperatures and clothing bound pressure to local blood circulation obstacles, triggering the skin to erythema, nodules, reticulate qingdao and other skin vasculitis. So the first key to winter skin care is to pay attention to skin warmth. 2, moisturizing: the water content of the skin accounts for about 20% of body weight. Water contained in the skin not only makes the skin to maintain normal metabolism, nutrition, and is an important human “reservoir”, once the human body is dehydrated skin will be the storage of water to provide out. Winter in the northern region of the dry climate, coupled with indoor heating so that the living and working environment humidity is reduced, so that the human body due to respiration and invisible evaporation of water loss increased, if you do not pay attention to timely supplementation of water, the human body will be in a long-term state of dehydration, the skin’s water content will be reduced. Skin dehydration not only makes the skin sagging, wrinkles and even cracked, but also affects the skin’s nutrition and metabolism, triggering skin itching, accelerating the aging of the skin. Therefore, winter skin care should pay attention to timely hydration in the diet to maintain skin moisture. Should develop the habit of drinking water regularly, if you always feel thirsty before drinking water, the body will often be in a state of dehydration. Wouldn’t bathing more often help the skin retain the necessary moisture? As the skin’s ability to absorb water is limited, and winter bathing is often high water temperature, often bathing will wash away the skin surface of the lipid film, the skin loses the protection of the lipid film in the dry environment is more prone to water loss, so the winter in order to the skin’s “moisturizing”, can not be too much bathing, especially the elderly sebaceous glands themselves reduced, the secretion of sebum is less, and then the skin will be in a state of water shortage. Secretion of sebum is less, and then excessive bathing, it is easier to lose water, dry, which is also the elderly winter skin often feel itchy one of the reasons. Therefore, in winter, the skin should be often coated with creams containing a certain amount of oil, so that the surface of the skin to form a layer of oil film to reduce the evaporation of skin moisture, loss, can effectively prevent the skin from drying out, which can also relieve the itchy skin caused by dryness.