In real life, after knowing that the skin affects the good and bad “master” so much, many women become very “fatalistic”, on their own skin quality “recognized”: white skin people peacefully enjoy it all; dull skin people can only put high-grade skin care products as a placebo, good or bad, they just can not take it. Enjoy all of this; dull skin people can only take high-grade skin care products as a placebo, good or bad, they just can not take it. In fact, you don’t have to be so pessimistic, because our skin texture is not set in stone. Good skin is certainly related to nature, but factors such as age and acquired maintenance can have an equally important impact on it. If you are resigned to your fate, good skin will get worse and bad skin will get worse. Knowing the following, you will regain confidence in your skin. Moisture and Oil Content Determine Skin Type Human skin has a weakly acidic membrane on its surface that regulates its condition and protects its health. This membrane consists of sebum secreted by the sebaceous glands and water secreted by the sweat glands. Whether the amount of the two is balanced or not determines the quality of this protective film, which is the characteristic of our skin. According to the different sebum content and water content in the skin, our skin can usually be divided into four types: dry, oily, neutral and mixed: dry skin is commonly found in the elderly and aging skin; oily skin is commonly found in young and middle-aged people; neutral skin is the best state of the skin, commonly found in pre-pubertal development of children; mixed skin is mostly found in young and middle-aged people. The choice of skin care products should vary according to the changes in sebum secretion and water content of the skin. Changes in sebum secretion: less – more – less Skin is a piece of the world can not stand the test of age “coat”, 20 years old colorful, 30 years old, dull, to the age of 40 or 50 years old on the fading color. The reason why this “coat” will be obvious changes, sebum secretion plays a major role. In a person’s life, sebum secretion has from less to more and then to less change rule. Infants and young children have less sebum secretion, so their skin is more fragile, wind and sun, fragrances, preservatives will cause damage to the skin. Infants and young children’s skin care products must not contain fragrances, it is best to have a sunscreen function. During puberty, sex hormones become active and sebum secretion increases, so many teenagers will be troubled by the large number of acne. At this time, we should pay attention to thoroughly clean the skin, can use a moderate amount of alcohol, can control the oil of the skin care products. After 35 years old, sebum secretion decreases, the skin becomes dry, easy to peel, sometimes even red, swelling, stinging, wrinkles also began to appear. At this time, you need to use products that can repair the sebum film on the surface of the skin during the day, and focus on eye care at night. After 45 years of age, the human testosterone level is declining, sebum secretion is further reduced, so middle-aged and elderly people should use oily skin care products. Changes in water content: from more to less Changes in the characteristics of the skin, but also with the gradual decrease in the water content of the skin stratum corneum. Experiments show that the water content of infant skin is twice that of adults, and the skin is very smooth and delicate, so the skin care products they use need to replace excessive nutrients with a moderate amount of disinfectant ingredients, mainly to play a basic protective role. To about 20 years old, the water content of the stratum corneum is slightly reduced, although the skin is smooth and flat, but at this time, if you do not pay attention to hydration, resulting in a further reduction in water content, there will be “false” wrinkles. After adulthood, the water content of the skin is even less, about 10%, at this stage, if you do not use professional moisturizing skin care products, the skin will be reduced because of the water and become parched, no luster. Therefore, as we age, we need to gradually focus on the moisturizing step in our skincare routine. Whichever moisturizer you choose, it’s best to apply it when the skin is wet for more immediate moisturization. Seasons and other factors also play a role Even at the same age, factors such as sun exposure and health conditions can cause the skin to change its nature. Clinically, it is most common for poor nutritional metabolism to hinder skin metabolism and ultimately change the dryness and moisturization of the skin. There are also mental factors, such as overwork, depression, mental stimulation, etc. can make the skin lose its luster, from oil to dry, become fragile, sensitive. Excessive exposure to ultraviolet light can cause irreversible damage to the skin, too cold, too hot, excessive mechanical stimulation is also the enemy of skin health. Therefore, to ensure that the skin quality to benign development, we must regulate these internal and external factors. If you do not pay attention to the regulation, even if you are born “bottom” and good, but also with the rapid passage of time.