A. Normal skin v sweat glands, sebaceous glands secretion is normal, skin moisture, oil to maintain a balance? Characteristics: 1, the skin thickness is medium, moist and smooth, elastic, no roughness, greasy feeling, fine texture, invisible pores. 2, not sensitive to external stimuli, more resistant to sunlight . 3, wash the face after the tightness of 30 s disappeared. Second, dry skin v sweat glands, sebaceous glands secretion less, lack of nutrients and dry skin, stratum corneum water content <10% ? Features: 1, clean appearance, thin skin, fine texture, invisible pores, white skin 2, weak resistance to external stimuli, environmental changes, mood swings when the skin changes significantly. Easy to grow pigmentation, flaking, wrinkles 3, tightness after washing the face > 40s 4, not easy to apply makeup, not easy to take off three, oily skin v stratum corneum water content is normal, sebaceous glands secrete a lot? Features: 1, the appearance of non-clean, oily and shiny skin, good elasticity, coarse texture, obvious pores . 2, strong resistance to external stimuli, not easy to produce discoloration wrinkles, few allergies, easy to appear acne Scum nose, boils. 3.Tightness after washing face <20s . 4.Easy to apply makeup, easy to take off makeup.