The skin is the most widely open and largest organ of the human body to the outside world. The epidermis of the skin is the protective film that serves as the first line of defense against external aggression and the last barrier between the body and the external environment. Infant skin does not fully reach adult structure until about three years of age. And the density of skin fiber bundles and the total thickness of the dermis are lower than that of adults. A baby due to the skin barrier function is weak, on the one hand, easy to absorb water, moisture content is higher than adults, so it looks water tender; on the other hand, the loss of water is also accelerating the dryness, scaling, and even peeling. At this time the baby will appear: irritability, hand and foot scratching, sleep disturbance. Second, the baby body surface area is larger than adults, so the heat dissipation surface is also large. Evaporation of sweat from the lenticels is 2 times as much as adults; easy absorption of external substances, at the same time, allergic substances or toxic substances are also much stronger reaction. Therefore, when we choose skin care products for babies, we should try to find some both can moisturize the skin, but also can block the external environment of certain microorganisms on the skin of the invasion and absorption of certain chemicals in the product, to the baby’s skin appearance wrapped in a layer of invisible, safe with a double effect of the protective film. Third, the number of sebaceous glands of infants after birth has basically reached the number of adults. Infant sebum secretion is more exuberant to form the physiological basis of seborrheic dermatitis. Some infants head and face of yellowish greasy scales and scabs should be applied first with moisturizing lotion gauze or paper towel to wipe away the baby shampoo cleaning. Fourth, the number of sweat glands in infants to unit area is higher density than adults, so, the baby skin in warm and humid conditions easy to sweat; but because the sweating center is not yet mature, but also unstable, sometimes the skin scales will block the conduit, affecting the function of sweating. Generally in 5-6 months began to have normal sweating function. Fifth, skin folds parts: often due to sebum and sweat impregnation, PH is acidic, it is easy to cause Candida infections (localized dampness, flushing, white membranous material). Therefore, we should use natural plant-derived cleaning and moisturizing and both natural anti-inflammatory essence of skin cleaning lotion, emollient lotion, talcum powder and other special products for infants, invariably adding a layer of baby skin with the prevention of skin candida infection of the protective film Sixth, the skin’s physiological functions: the skin has a protective, absorbent, secretion, excretion, sensation and regulation of temperature and other physiological functions, but also involved in a variety of material Metabolism, and is an important immune organ, so that the body to maintain a stable internal environment. Infants’ own immune system is not yet perfect, resistance is weak, so it is easier to skin allergies, such as: erythema, rash, pimples, blisters, and even peeling. Therefore, you should stay alert to avoid your baby’s skin suffering from irritation. Therefore, we should pay attention to the following points when choosing skin care products for babies: 1, avoid contact with the environment of some irritating or sensitive substances; 2, avoid the use of alkali, shoddy cleansing bath agents and soaps; 3, appropriate use of natural moisturizers after bathing; 4, dry skin to give natural moisturizing products; 5, to reduce friction between the skin, the skin and clothing, choose pure cotton, soft, easily absorbent Choose pure cotton, soft, easy to absorb clothing and diapers; 6, reduce the absorption of chemical products in the environment, the use of natural moisturizing skin care products.