Staying up late at work, watching TV shows, dry climate in winter and spring, not paying attention to sun protection in summer, time passes, the skin is no longer young, metabolism decreases, coupled with the accumulation of cosmetics over time, the formation of dry skin, dull yellow, pigmentation, yellowish facial complexion and other various skin problems, although daily moisturizing, sunscreen, whitening, how the skin is not shiny. Not properly care for the skin, there will be many skin problems. 1, dry skin The lack of moisture in the skin is a discomforting phenomenon. The symptoms are mainly tight skin, individual parts of the dry skin, itchy after bathing the whole body. Ageing, climate change, lack of sleep, excessive fatigue, overheated bathing water, strong alkaline detergents, etc. are all important causes of dry skin. Preventive measures are to strengthen the daily care and maintenance of the skin, to reasonably adjust the diet structure, and to insist on drinking more water. 2, sun spots, tanning Summer is coming, if you are not careful with outdoor sports, the skin will be tanned, sun red or even the risk of sunburn. After the sunburn is not handled properly, it will cause serious damage to the skin, UV damage to the skin is not just tanning and leaving sun spots so simple, it will also make the skin become sensitive, young lines, premature aging and other problems. 3, pigmentation human skin for various reasons, resulting in different colors, different ranges and shades of skin pigmentation changes. Long-term use of hydroquinone can occasionally cause browning disease. Sunlight exposure can also promote skin pigmentation, brown spots, etc. 4.Chloasma is a kind of yellowish-brown pigmentation spot (usually symmetrically distributed on the forehead, cheeks and cheekbones) occurring on the face with clear borders. Melasma mainly occurs in women with pregnancy, gynecological diseases and oral contraceptives. It can also be primary, occurring in non-pregnant women and men with darker skin tone and pregnancy-related hyperpigmentation, which can partially fade slowly after delivery, and skin hyperpigmentation associated with estrogen use, which can also partially fade slowly after cessation of use. 5, uneven skin tone Skin under the sun’s ultraviolet radiation will form a lot of melanin in the dermis, after metabolism, skin cells layer by layer, melanin also pushed upward, piled up on the epidermis, if our skin metabolism is faster, melanin will fall off, if the metabolism is slow, it will be piled up to the epidermis, the epidermis in some places piled up more, some piled up less, some The skin tone is uneven because of the thick and thin layer. Age increase, unbalanced nutritional intake, external pollution, unreasonable habits, overload work, mental stress, incorrect skin care and other factors together, often lead to the body’s own detoxification system can not efficiently and thoroughly complete the task, and reflected to the skin surface will also appear uneven skin tone. 6, yellow skin Yellow skin is likely to be insufficient rest and nutritional deficiencies. Computer radiation is also related, if you are facing the computer every day skin will easily become dry and yellow, the computer screen is generated electrostatic, in the process there are a lot of tiny fine dust to your face to fill over. The accumulation of grease, old keratin and dirt on the surface of the skin if not removed in time causes yellowing of the skin. Poor quality skin care products contain harmful chemicals such as lead and mercury, which can also make the skin tone yellow and dark. Long-term late nights and lack of sleep also cause yellowing of the skin.