It is best to use laser to remove it, and the effect is very good. If the color is light, it can be completely removed once or twice. If the color is dark, it needs to be done 3-5 times to achieve the effect of permanent removal. Pay attention to diet at ordinary times, don't eat foods with high pigment content, prevent pigment from depositing locally, such as coffee, noodle sauce, purple grapes, etc., and don't eat cold and spicy things.