The main ways to leave scars to lighten melanin are the following: 1, more food rich in vitamin C, melanin formation is the oxidation reaction in chemistry, vitamin C has the role of blocking the formation of melanin. Therefore, we must eat more vitamin C-rich foods, such as tomatoes, kiwis, carrots, etc. 2, the clinical can use laser light melanin, medical beauty melanin removal mainly only with laser treatment program, the use of laser photoelectric thermal effect of crushing melanin cells, so that melanin completely removed. 3, the choice of whitening cream or essential oil for skin massage, applied to the face for Gently massage. The effect of promoting blood circulation in the face to accelerate the discharge of melanin deposited on the face, thus playing a role in lightening melanin.