What are the manifestations of dry skin, and what causes dry skin?

Dryness is the uncomfortable phenomenon of lack of moisture.

The main symptoms are tightness, dryness and peeling of individual parts, and itching all over the body after bathing.

Aging, climate change, lack of sleep, excessive fatigue, overheating of bath water, and strong alkalinity of washing products are all important causes of dryness.

The preventive measures are to strengthen the daily care and maintenance of the first class, reasonably adjust the diet structure, insist on drinking more water, eat more fruits, adjust the work and rest time, and do not overwork.

**It is the natural coat of the human body, which is generally divided into three parts: epidermis, dermis and subcutaneous tissue from the outside to the inside, and the epidermis is divided into stratum corneum, transparent layer, granular layer, spinous layer and basal layer.

The outermost stratum corneum plays an important role in the integrity of the barrier function.

There is a sebum film above the stratum corneum, which is a translucent milky film formed by the emulsification of sebum, sweat and epidermal cell secretions, and the free fatty acids, lactate, urea and uric acid in the sebum film are natural moisturizing factors, which play a moisturizing role.

The stratum corneum and sebaceous membrane prevent the loss of moisture.

Under normal circumstances, the water content of the stratum corneum should be about 10%, below this level, it is dehydrated skin;

By using lanolin or body lotion to maintain or exceed this water content, it is an indication that the moisturizing state is good and has reached an excellent state.

Dryness refers to thickening and roughening due to seasonal changes, dehydration and anemia.

In autumn and winter, the body's sebum and water secretion will gradually decrease, and it will become dry obviously, called dryness, especially in the middle-aged and elderly due to a large decrease in water, the surface layer will appear more dry, and they will often see their hands and feet, calves will be dry and itchy.

Summary. Environmental factors such as cold and dryness, frequent contact with alkaline substances, and decreased sebum secretion in old age can lead to the occurrence of this disease. In addition, some systemic diseases and congenital appendage defects can also cause a local lack of sebum.

Its pathogenesis is a lack of sebum or decreased secretion, unable to form a normal sebum film on the surface, unable to lubricate and prevent water loss, thus showing the phenomenon of dryness.

What causes dryness?

Environmental factors such as cold and dryness, frequent contact with alkaline substances, and decreased sebum secretion in old age can lead to the occurrence of this disease. In addition, some systemic diseases and congenital appendage defects can also cause a local lack of sebum. Its pathogenesis is a lack of sebum or decreased secretion, unable to form a normal sebum film on the surface, unable to lubricate and prevent water loss, thus showing the phenomenon of dryness.

I hope mine can help you.

**There are generally three main causes of dryness::

Clause. 1. Physiological dryness, for example, the elderly are prone to dryness due to the reduced function of the sebaceous glands and less oil, especially in the calf, like in winter, due to the lack of oil production and sweating, even young people will have **dryness on both calves in winter, which are physiological phenomena.

Clause. 2. Pathological phenomena refer to the occurrence of dryness due to special diseases, such as abnormal kidney function, or hypothyroidism, uremia, liver disease or more serious diabetes, and diseases of these systems can also lead to dryness.

Clause. Third, the secondary, ** itself is not a big problem, but due to improper treatment caused by the occurrence of ** dry improper treatment, including such as vigorous scalding, or frequent bathing. Every time you take a bath, you use a strong alkaline detergent, shower gel or soap, or use a topical preparation containing alcohol, due to a variety of improper treatment or the use of inappropriate drugs, which also leads to dryness, and the common ones are the above three categories of causes of dryness.

Blowing the air conditioner in the house in the summer is particularly easy to cause our **dryness, and we should do a good job of hydrating and moisturizing in the summer. Hope mine is helpful to you!

1. Increasing age. As we age, our ability to retain water decreases, and sebum secretion decreases, resulting in less water.

2. Insufficient sebum secretion. **The surface is formed by a sebum film that helps the skin maintain proper hydration. Once the secretion of sebum decreases, the need to make a sebum film cannot be met, and it becomes dry.

3. The temperature drops. When the weather is cold, the secretion of sebum and sweat will decrease rapidly, but because the air is too dry, the water will gradually evaporate, the surface of the skin will become rougher, and the resistance will be weakened.

4. Lack of sleep and fatigue. Lack of sleep combined with fatigue can cause considerable damage to the body and worsen blood circulation. When health is out of balance, the skin becomes less vibrant, prone to dryness and roughness.