What is the reason for the cold weather and itchy legs?

Skin sensitivity is related to dry skin, as well as environment, climate, age, food and cosmetics. Allergic people should pay more attention to the balanced intake of diet and nutrition, eat more fruits and vegetables, and eat less fish and shrimp, beef and mutton and greasy, sweet and irritating foods.

Skin is divided into epidermis, dermis and subcutaneous fat. The outermost layer of epidermis is stratum corneum. Because of the water absorption and barrier function of the stratum corneum itself, and the natural moisturizing factors such as amino acids, lactate and sugar contained in the stratum corneum, the stratum corneum maintains a certain water content and keeps the skin moist. The appearance of skin is related to the moisture content of stratum corneum. Normal stratum corneum usually contains 10%-30% moisture to maintain skin softness and elasticity. However, with the increase of age, the water content of stratum corneum will gradually decrease. When the water content of stratum corneum is lower than 10%, the skin will be dry, tight, rough and desquamated.

So what are the reasons for skin moisture loss, dry skin and loss of luster? Generally speaking, the internal and external conditions that cause the natural moisturizing structure of the skin to lose balance mainly include:

With the increase of age and skin aging, its moisturizing function and barrier function gradually weaken, and the content of natural moisturizing factors decreases;

Dry and cold climate with low humidity, such as autumn and winter;

Some skin diseases, such as psoriasis and ichthyosis;

Environmental and chemical factors, such as organic solvents such as washing powder, soap and detergent, such as alcohol, and long-term air conditioning environment;

Eating and sleeping habits, such as partial eclipse, drinking less water, insomnia, etc.