If you get tanned, you should step up the whitening offensive and adjust inside and outside. External maintenance, be sure to do a good job of sun protection when going out. Even if there is no sunlight, there will still be ultraviolet rays. Sunscreen is necessary, and an umbrella or hat can prevent ultraviolet rays. Attention should be paid to preventing ultraviolet rays indoors, because ultraviolet rays will be refracted into the room through glass or lenses. It is also necessary to rub some cream on computer workers for a long time. After returning home, I will make some whitening masks (Lifecella jelly mask, vitamin C orange mask and moisturizing mask recommended by Big S) and use whitening skin care products (whitening skin care products are selected by myself according to my skin quality and economic conditions, so I don't know how to answer because the questioner didn't specify the skin quality of my female friend), but it is useless to blindly use whitening products on my skin. On the basis of external maintenance, I also need internal adjustment to fully supplement vitamin C! Eat more fruits and vegetables rich in VC, such as kiwi fruit and tomatoes. Or just eat some VC and vE sold in the market. Remember, it is best not to eat parsley, celery, carrots and papaya. They all contain light absorbers, and after eating them, the skin tends to turn black in the sun. If you want to achieve whitening, you must persevere. It is useless to give up halfway. Little by little, you will see the effect of your own whitening efforts! (Note: The first step of whitening is moisturizing and hydrating)