What causes vitiligo on lips?

Skin diseases, vitiligo eat more: animal liver, kidney, fresh eggs, fresh tofu, beans, lean meat, fresh vegetables, sugar cane, raw sunflower seeds, black sesame seeds, walnuts. Eat more foods containing tyrosine and minerals, meat (cattle, rabbits, pork lean meat, animal liver, eggs (eggs, duck eggs, quail eggs, milk (milk, yogurt, vegetables (fresh vegetables, and radish, eggplant, winter bamboo shoots, black fungus, kelp and other beans (soybeans, peas, mung beans, black beans, and other bean products, peanuts, black sesame seeds, walnuts, snails, clams and other shellfish food.