If you are exposed to the sun for a long time and need urgent remedy, the first step should be to fully hydrate your skin. Oh, you should wear some moisturizing cream. The most taboo is to take a cold bath immediately after the sun exposure. Although this can cool the skin quickly, it will also take away the moisture in the skin and make the skin drier. So it's best to rub and hydrate first. A glass of frozen lemonade contains a lot of vitamin C, which is helpful for whitening.