1, the use of sunscreen, choose SPF in 15-30 sunscreen; or use UV protection umbrella. 2, avoid going out when the ultraviolet rays are strong, such as 10:00 a.m. – 3:00 p.m., when the sun’s ultraviolet rays are the strongest, and the damage to the skin is also the most powerful. 3, avoid eating and topical photosensitive substances, such as taking celery, ashwagandha, zinnia, snowdrops, lettuce, fennel, amaranth, capers, celery, radish leaves, spinach, raising wheat, parsley, safflower grass, rape, mustard, figs, citrus, lemon, mango, pineapple and so on. In addition, including snails, shrimp, crab, mussels, etc. is also photosensitive seafood; with lemon, celery, cucumber and other vegetables on the face; in addition, photosensitive drugs such as sulfonamide, quinolones also need to be careful with the use of drugs, after the use of must pay attention to avoid the sun. 4, after the sunburn back home, the most important thing is to eliminate the feeling of hot skin in a timely manner. Most women will wash their faces and use lotion to cool down their skin. However, research has found that cooling with cool boiled water is simple and easy, perfect for summer skin care. The average woman is used to patting lots of lotion on sun-red or hot skin to cool it down and add moisture. In fact, washing your face and skin care can be simpler, just cool boiled water is enough. Cool boiled water is a kind of “de-aerated water” that contains little air. Boiling water naturally cooled to 20 ~ 25 ℃, dissolved in the gas than before boiling less than 1/2. water properties have changed accordingly, cohesion increased, the molecules are more compact, etc. These substances are similar to the water in biological cells. These substances and biological cells within the water is very close, there is a great “affinity”, can make the cool water easier to penetrate the skin. In addition, the cool water can also make the subcutaneous fat is “semi-liquid”, so that the skin looks soft and healthy. It is recommended that you try to wash your skin with cool water as often as possible when working outdoors in the summer, and you can put the cool water into a sprayer-type bottle for easy use. In addition to slowing down the damage to the skin from exposure to the sun, it also enables the skin cells to maintain sufficient moisture and appear delicate and elastic. 5, if a serious sunburn occurs, you need to go to the regular hospital dermatology department to receive treatment, taking light-sensitive drugs, wet compresses, and even the right amount of glucocorticoid therapy.