Hot weather, human skin cell metabolism accelerates, sebaceous glands secretion, skin discharge of a large amount of sweat and other waste increased, skin acidity decreased, the ability to resist disease weakened, increased sensitivity; sunlight can also induce or aggravate certain skin diseases, or make the skin aging; because of the heat people often go to the countryside to play, or to the flowers and trees in the cool, easy to occur skin allergies or insect bite dermatitis. Therefore, it is very important to protect the skin in summer. 1, strengthen the skin cleaning Summer skin cleaning is more important than other seasons, because the summer heat, the skin discharged a lot of sweat and some body waste, changing the pH of the skin surface, the skin’s ability to fight disease is weakened, bacteria are prone to reproduce on the skin surface, so summer to pay attention to skin cleaning, to diligent bathing, diligent dressing, indoor ventilation, while you can use some talcum powder to keep the skin dry and cool. Keeping the skin clean can also prevent skin aging. 2, pay attention to skin moisturizing The water content of the skin is the key to keep the skin moist, plump and bright. Summer due to sweating skin is mostly moist, but due to sweat and odor people take a shower or bath every day to increase the number of times, here to remind you that the daily bath water temperature is not too high, wash time is not too long, do not use the bath or soap excessive scrubbing skin, because excessive use of alkaline bath or soap scrubbing skin will make the skin dry, itchy, promote skin aging. Clinically, we often see patients who come to the clinic because of incorrect and excessive bathing every day resulting in rough, itchy, aging skin. After bathing can be used externally some moisturizing cosmetics such as 30% glycerin water, or oral, topical antioxidants to keep the skin moist and prevent skin aging has a certain role. 3, sunscreen homework must be done UV is one of the main causes of skin aging in exposed areas, and summer is a strong season of sunlight irradiation, so in the summer to prevent UV damage to the skin, is an important part of the prevention of skin aging. First of all, when you go out to wear sunscreen hat or umbrella, especially some people sensitive to ultraviolet rays also wear long-sleeved clothes, but also pay attention to diet, such as do not eat wild vegetables, parsley, celery, parsley and other photosensitive vegetables, try to avoid eating seafood and mango, pineapple and other fruits. In addition, the concentration of sunscreen is also important, a better sunscreen should be able to UV protection (both UVA and UVB protection). Usually the sun protection factor (sun protection factor, SPF) value is 15-30. SPF is obtained by measuring the minimum amount of erythema of the product to protect and not protect the skin, theoretically speaking, the greater the SPF value of the sunscreen product within a certain range, the stronger the sun protection effect, but in fact, the SPF value of 30 products, the blocking rate of UVB up to 95 More than, can adapt to the needs of most people. 4, more food containing vitamins A, B, C, E food to strengthen the dietary mix, summer more food containing vitamins A, B, C, E for skin health effects. Vitamin A has antioxidant, anti-keratinizing effect, animal liver, cod liver oil, carrots, pumpkin, apricot, milk and other foods rich in vitamin A; vitamin B family involved in the metabolism of the skin, in beans, lean meat, bird eggs, fish, nuts, yogurt, cheese, vegetables and other foods with high content; vitamin C can help the human skin collagen synthesis, prevention and control of skin aging, remove pigmentation function, vitamin It is recommended that people eat more fruits and vegetables in summer, drink more water, draw sufficient amount of water, avoid high-fat and caffeine-containing food, and do not smoke.