It is a common phenomenon that some parts of the body turn black, mostly because melanin is at work, and ultraviolet rays can directly stimulate the skin through clothes. If the knees are black, they can be whitened in daily life. Rubbing knees with sea salt or coarse salt and mixing whitening emulsion with vitamin C and lemon juice can effectively improve the blackness of knees.

Melanin deposition is a skin phenomenon, which is caused by endocrine balance, almost everyone has it, and it is caused by ultraviolet radiation. This abnormal pigmentation of melanin deposition will affect the beauty of human skin and appearance. The treatment of melanin deposition is mainly to quickly eliminate toxins in the body, avoid pigmentation, and appropriately inhibit the formation of melanin deposition, which can effectively achieve whitening effect.

Ways to whiten your knees:

1, take a proper amount of sea salt or crude salt, wet it with water, and gently rub it in the dark area of knee skin for about 3 minutes.

2. Squeeze a little whitening lotion on the palm of your hand, then pour in nearly a spoonful of vitamin C powder, stir it evenly, and apply it to the dark area of your knees and rub it once a day. After about a week's use, there will be obvious improvement.

3. Mix the fruit acid solution with fresh lemon and water, smear it on the dark area of knee skin, and wash it off after 15 minutes, and see the effect after one week.

The above are several common methods. If not, you need a professional beauty program to improve.