The human body produces a high-grade "skin care product" without it as soon as it is itchy in winter

As the temperature drops and the weather dries up, one thing that bothers many people has emerged is that in the winter, the skin is particularly itchy. Many people have such an experience, in the winter, the calves are dry, especially itchy, and a lot of dander is dropped when you touch it.

Why do our good skin itch? Dr. Li Shenqiu of the Department of Dermatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, introduced that the upper layer of the skin is the epidermis, and the bottom is the dermis. The dermis layer contains blood vessels, lymphatic vessels, and some nerves. If the dermis of the skin is understood as a city wall, then the skin is equivalent to a moat outside the city wall.

People's most basic skin care is to rub protective cream, in fact, our human body itself will also produce a very high-level "cosmetics", which is emulsifying film. The emulsifying membrane is a protective film formed on the surface of the skin by the fusion of sebum and involuntary sweating secreted by our sebaceous glands.

The emulsifying film can retain the moisture of the skin, so that the evaporation of water becomes slower, at the same time, after the production of sebum, it is metabolized to produce a fatty acid, so that some bacteria and other microorganisms are not easy to grow here.

If the skin emulsifying membrane is destroyed, various irritating substances will enter the epidermis, causing a skin reaction, which in turn stimulates the nerve endings of the dermis layer, which will cause itching. As time goes on, coupled with scratching, the skin becomes more and more sensitive, and this process is the process of itching.

With age and gender, the secretion of sebaceous glands varies. After men enter the puberty period, the secretion of sebaceous glands is very high, and male hormones in men can act on the sebaceous glands, so that the hyperplasia of sebaceous glands expands and secretion increases, until after the age of 50, the secretion of sebaceous glands in men gradually decreases. Sebaceous gland secretion in women is worse than in men, and sebaceous gland function may be lower by about 40 years old.

Babies are born with good sebaceous gland secretion, which is very low at 6 months, and some young parents will cause their children's skin to be dry and itchy.

If you do not take a bath for a long time, the emulsion film is fused with dander, bacteria, and dust, which will make people very uncomfortable on the surface of the skin, then it will naturally itch. But if you wash too often, it will also be itchy, because the production of sebum takes time, if you wash too often, the emulsifying film is too late to form, the water evaporates too quickly, and the skin will dry and itch.

Especially when some elderly people have itchy skin, they think that the skin is dirty, so they take a bath, and the result is that the more they wash, the more itchy they are, the more they wash, forming a vicious circle. So it is generally recommended to take a bath once or twice a week as well. In addition, when bathing, you should also pay attention to two points: the water temperature should not be too hot, and the temperature is similar to the body temperature; do not rub the bath hard, and rubbing the emulsifying film hard will also cause itching.

All in all, if the sebum is produced slowly, the emulsifying film is formed slowly, and the skin is prone to dryness and itching. Autumn and winter are drier, bathing is too frequent, moisture loss is faster, skin epidermal destruction will also accelerate, and winter pruritus will follow. (Content source "Workplace Health Class")