It is not recommended to pursue a quick change in skin color to return to fair skin, because the normal metabolism of the skin has its own rules. Excessive pursuit of rapid whitening may cause damage to the skin, such as skin allergies, dryness, thinning of the stratum corneum and other problems. Healthy whitening is a relatively slow process that requires continuous care. You can try to do a good job of daily sun protection to prevent ultraviolet rays from further damaging the skin and causing the skin color to deepen; regular work and rest, balanced diet, to ensure the overall health of the body is good, which is conducive to normal skin metabolism. If you want to improve the dull skin color to a certain extent, you can use some mild whitening skin care products, such as products containing ingredients such as niacinamide, tranexamic acid, vitamin C and its derivatives, but be careful to choose regular brands and use them according to the instructions. It is not recommended to try some so-called "rapid whitening technology" without scientific basis or use whitening products of unknown origin that may have safety risks. If the skin color changes abnormally or is accompanied by other discomforts, it is recommended to see a doctor first to check whether there are potential health problems, rather than simply focusing on rapid whitening.