For groups who want to whiten their skin, they should first clarify what kind of factors exist in themselves that lead to dull and dark skin tone, and they need to carry out whitening treatment for their own factors and prevent their skin tone from dulling again. Therefore, there is no such thing as what works well. Usually the darkening of the skin tone due to sunlight can be improved by daily conditioning. If the skin dullness or skin problems caused by disease or ageing, priority should be given to treating the original disease and following medical advice to use drugs and other whitening. First, daily conditioning: 1, skin care: do a good job of facial cleaning, exfoliation, to reduce pigmentation. Choose suitable skin care products to help improve skin tone; 2, sunscreen: daily sunscreen, go out with umbrellas, hats, etc., to prevent skin absorption of ultraviolet light darkening. If you use skin care products containing acid, you should do a good job of sun protection to avoid skin pigmentation; 3, diet: reduce the consumption of foods that are easy to generate melanin, such as nori, eggplant, etc., to inhibit the formation of melanin from the source. Can be appropriate to eat vitamin-rich tomatoes, grapes, etc., to help improve skin tone. Drug treatment: 1. Depigmentation agent: It is mostly used in the treatment of melasma, freckles and other pigmentation to reduce pigmentation. Commonly used drugs such as hydroquinone cream; 2, keratin exfoliators: used for the treatment of acne, keratosis and promote the shedding of hyperkeratotic keratinocytes. Common drugs such as salicylic acid; 3, keratin regulators: used in the adjuvant treatment of flat warts, periorbicular keratosis, scaling disease, regulating epidermal keratin, melanin production, common drugs such as vitamin A acid cream; 4, other: can be under the guidance of doctors oral vitamin C, vitamin E or cod liver oil, etc., taking a period of time can help brighten the skin tone. Third, other treatment: some people may not improve the symptoms through oral medication and daily conditioning, can choose to improve pigmentation directly by laser and other means. You can also consider performing fruit acid whitening in a regular plastic surgery hospital, which also helps to improve skin tone.