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皮肤的状态是由角质层的水分与皮脂的分泌来决定的,根据皮肤含水和油脂量及皮肤的敏感程度,可分为干性、中性、油性、混合性和敏感性皮肤。干性皮肤角质层水分低于10％、皮脂分泌明显减少的皮肤为干性皮肤。其形成的内因与先天性皮脂活动力弱,后天性皮脂腺和汗腺活动衰退、维生素A缺乏、偏吃脂肪少的食品、皮肤血液循环不良及营养不良、疲劳等有关;外因方面与烈日曝晒、寒风吹袭、乱用化妆品、以及用肥皂洗脸次数过多等有关。皮肤的特征是白皙、细腻,干燥少脂,毛孔不明显,无光泽,可见粉状脱屑;经不起风吹日晒,若晒得厉害一些皮肤
The state of the skin is determined by the secretion of water and sebum in the stratum corneum, which can be divided into dry, normal, oily, mixed and sensitive skin depending on the amount of water and fat in the skin and the sensitivity of the skin. Dry skin stratum corneum moisture less than 10%, significantly reduced sebum secretion of the skin is dry skin. The formation of internal causes and congenital sebum activity is weak, acquired sebaceous glands and sweat gland activity decline, vitamin A deficiency, partial eating less fatty foods, poor skin circulation and malnutrition, fatigue and so on; external aspects of the sun exposure, cold Wind attack, indiscriminate use of cosmetics, as well as the number of times to wash with soap and so on. The characteristics of the skin is white, delicate, dry and less fat, pores are not obvious, dull, visible powder scaling; can not stand the wind and the sun, if the sun a lot of skin