1, frequent application of sunscreen products and ultraviolet rays is the chief culprit for completely blackening the skin. Long-term exposure to ultraviolet rays will not only make the skin tan in a large area, but also cause local melanin to precipitate and form spots, so preventing melanin precipitation (sun protection is very important, really important) is the most direct and effective way to block melanin formation! 2, eat vitamin C to improve the brightness of skin color Although the melanin content in each human body is different, everyone's skin color is different. But regardless of the natural skin color, if the skin color is dull caused by sun exposure, taking a vitamin C every day is slow, but it is good for improving the brightness of skin color. 3, hydrating and hydrating, it is also important for the skin to drink enough water. After the water in the stratum corneum of the skin is lost, it will start to lose the water in the bottom layer of the skin, and it is easier to form light spots at this time. Girls in the south generally have good skin, that is, the air is humid and the skin is always full of water, so it is not easy to grow spots. 4. Pure natural milk This method is very simple. Take a small glass of low-fat pure milk and steam your face. Then soak the mask paper in fresh milk, completely absorb the mask paper, apply it on your face for about 15 minutes, and then take it off. Finally, wash the milk on your face with clear water. Sticking to this method can make your skin whiter and more even. 5, white vinegar white vinegar, it has the effect of promoting blood circulation, ruddy, whitening and firming skin, suitable for all skin types, and has a good effect on spotted skin. Mix toothpaste and white vinegar evenly, put it in a cool place for a few hours, then open the filtered juice and mix it evenly with warm water. After turning into paste, you can immediately apply it to your face and press it repeatedly with your hands to help absorb it.