A healthy facial skin condition is usually determined by the balance between skin oil and water, and lack of water on the face usually leads to dry, rough skin or high oil secretion and other unhealthy conditions. For different kinds of facial skin, the symptoms of skin dehydration are different. 1, dry skin: because this skin usually contains less water, lack of elasticity, and easy to wrinkle, if the face is dehydrated, usually manifested as dry skin, taut, peeling, rough and lusterless, especially in autumn and winter, the air is dry, sand and dust, the skin surface moisture evaporates quickly, more likely to cause dry skin and other phenomena. Such people should pay attention to the use of a gentle way to wash their faces, skin care work must be sufficient to give the skin proper moisture and oil, do not remove too much oil, so that the skin can be conditioned to a healthy state; 2, oily skin: oily skin face dehydration is mainly manifested as the surface of the skin greasy, dry peeling and large pores and other symptoms. This is because when the skin is dry and dehydrated, the sebaceous glands will secrete more oil to make up for the dryness caused by the lack of moisture. And because too much oil is secreted, it easily absorbs dust in the air, making pores clogged and enlarged. In this regard, oily skin people also need to do a good job of hydration; 3, mixed skin: mixed skin refers to the face T-shaped area is oily skin, while other areas are dry skin. Such people face dehydration usually show me T-zone skin greasy, pores are large, while other areas are dry, peeling. Therefore, in the maintenance should be partitioned maintenance, such as the T-shaped area should be more hydration and moisturizing, while other areas should be oil and water are supplemented. Long-term facial dehydration will cause skin relaxation, elasticity decline, long wrinkles, long spots and other phenomena, so patients should be scientific and reasonable skin care, selective use of hydrating and moisturizing skin care products for their own situation, and the use of milder cleansers to avoid excessive cleaning. You should also drink more water and eat more vegetables and fruits, such as apples, cabbage, cucumbers, celery, etc., to reasonably replenish the body’s outflow of water to promote basic metabolism and nourish the skin.