In fact, our skin darkening after sun exposure is a natural protection, by melanocytes producing a large number of melanin particles that allow the most important part of our cells, DNA, to be less damaged. Therefore we are less susceptible to sunburn and have a lower incidence of skin cancer compared to Caucasians. However, this dark skin tone is not liked by many people, especially women who love beauty. How to remove it? It takes at least 28 days for the melanin produced by the skin after tanning to be removed by the skin’s own metabolism. The following methods can alleviate the discomfort or accelerate the recovery of skin color to some extent after sun exposure. 1. Apply a cold compress or use a soothing, anti-inflammatory after-sun repair skin care product immediately after sun exposure. Tanning is the result of ultraviolet light stimulating melanocytes to synthesize large amounts of melanin, and melanocytes are maintained in an active phase for a long time after sun exposure. After-sun skin redness and discomfort suggest a significant inflammatory response, an important factor in activating melanocytes, can be immediately applied with a cold wet towel or with some cold water spray or mask. If at the same time use point with anti-inflammatory function of skin care products like containing natural plants chamomile, licorice, etc. will be helpful. 2, after the sun needs to pay attention to moisturizing, UV radiation will inhibit the synthesis of the skin’s own moisturizing factors, the skin will become dry, and the stratum corneum will thicken, these will make the skin look rougher, no luster. The skin for the reflection and refraction of light shot to its surface determines the skin tone we see, if the surface of the skin is dry, rough, piled with a lot of old waste keratin, will certainly look dull color. 3, skin care products containing fruit acids and vitamin C can speed up the recovery of skin color. Cosmetics containing fruit acids can promote skin dermis metabolism, accelerate the already synthesized melanin through the skin stratum corneum renewal and discharge. Vitamin C, on the other hand, has a strong antioxidant effect and can convert the already synthesized melanin particles into a reduced state, lightening the color. Now there are some new ingredients such as lignin peroxidase which is a biological enzyme isolated from fungus, it can break down the melanin already synthesized in the cells, thus speeding up the recovery of skin color. Of course, the above-mentioned after-sun repair are all part of the practice of mending, if we can do more proactive prevention work for UV rays in the summer would be better. First of all, pay attention to sunscreen, sunscreen should be used all year round, and need to use broad-spectrum sunscreen, both UVB and UVA protection, because the UVA in the ultraviolet ray can penetrate the glass, straight to the real layer of the skin, more damage to the skin, is the cause of aging and darkening of the culprit. When using sunscreen to pay attention to the amount to be sufficient, the entire face needs to be close to 1 gram of the amount to play a good sunscreen effect. In addition, for people who are oily and sweaty, it is also important to reapply after 2 to 3 hours. Secondly, you can usually consume more antioxidants, such as fresh vegetables and fruits rich in vitamin C, green tea, soybeans and other foods are also very good, so that you can resist oxidative damage brought about by UV rays and protect your skin. In fact, sun protection is not just something that ladies do for the sake of beauty, it is a big issue for the health of the whole human race, and frequent sunburns can also increase the chances of skin cancer and other diseases in the future. So everyone should pay attention to avoid exposure to the hot sun from a young age. Care for yourself to be healthier.