Dry skin refers to the phenomenon that the skin lacks moisture and feels uncomfortable. The symptoms are mainly skin tightening, dry peeling of individual parts, and itching after bathing. Age, climate change, lack of sleep, excessive fatigue, overheating of bathing water, and strong alkaline detergents are all important causes of dry skin.
Skin is a natural protective coat for moisture
The skin is the natural outer coat of the human body. It is generally divided into three parts: the epidermis, the dermis and the subcutaneous tissue. The epidermis is divided into the stratum corneum, the transparent layer, the granular layer, the spinous layer and the basal layer. The stratum corneum of the outermost layer of the skin plays an important role in the integrity of the skin barrier function. There is a layer of sebum film on the stratum corneum, which is a translucent milky film formed by emulsifying sebum, sweat and epidermal cell secretions. Free fatty acids, lactate, urea and uric acid in the sebum membrane are natural moisturizing factors. Moisturizing effect. The stratum corneum and sebum membrane prevent the loss of skin moisture.
Do not blindly exfoliate
The stratum corneum, like an armor, provides the function of a skin barrier. Therefore, the water content of the stratum corneum is the key, all factors affecting the water content of the stratum corneum can affect the skin's moisturizing conditions, such as age, season, skin care, eating habits and so on. Water-deficient, dry skin is often dull, dry, suede and even finely wrinkled; excessively dry skin is accompanied by a dry, tight feeling. For those who have good skin moisturization, the skin is not only shiny, elastic, but also has a very high color saturation, so-called "white-red" type skin.
Healthy skin is moist and beautiful
The skin is only in the normal pH range (average at pH 5.8), that is, it is weakly acidic, so that the skin is in the best condition for absorbing nutrients. At this time, the skin resists external erosion and elasticity, luster and moisture. Wait, it's all in the best condition.
Is your skin short of water?
If you have the following skin conditions, the skin is dry and dehydrated. Of course, you don't have to be afraid, adjust your skin care habits , and stay away from these bad habits, your skin will return to radiance.
1. Age growth is one of the causes of dry skin. As the level of estrogen in the body decreases, the secretion of sebum decreases, and the ability of the skin to retain moisture decreases, making the skin more and more dry. This is also a major reason why mature women have dry, rough and watery skin during the autumn and winter seasons.
2, the skin surface of the stratum corneum contains a "natural moisturizing factor", the number of which determines the water content of the skin. Excessive use of exfoliating products is prevalent in modern women, which can reduce the ability of the skin to secrete oil, resulting in dry and water-deficient.
3. Climate change. Changes in the external climate can cause abnormal secretion of sebaceous glands and sweat glands, and the surface of the skin becomes rougher and the resistance is weakened. After a long time, it may be habitually dry.
4, lack of sleep, fatigue, excessive weight loss and partial eclipse. Insufficient sleep, fatigue, excessive weight loss and partial eclipse can cause considerable damage to the body and poor blood circulation. When health is out of balance, the skin becomes inactive and prone to dryness and roughness.
5. Bathe in hot water, use irritating soap or detergent. Bathing with overheated water, using irritating soaps or cleansers, or female endocrine changes (such as decreased estrogen secretion in women after menopause) can also cause dry skin. However, this is a short-term phenomenon that can be improved immediately.
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