1, keep a regular life, avoid staying up late and straining, keep a happy mood, avoid mental tension. 2, pay attention to the cleanliness of the skin, to avoid the inhalation of harmful substances such as firecrackers and smoke and scratching and scalding bad stimulation. 3, pay attention to dietary taboos, avoid overeating, pay attention to adjusting the gastrointestinal function, to keep the bowel movement smooth. Foods that may have an impact: 1, tobacco, alcohol and spicy stimulating food, such as onions, garlic, leeks, ginger, pepper, chili, cinnamon, etc.. 2, avoid greasy, dry and hot food. 3, avoid high sugar, high fat food, so as not to produce moisture and heat. 4, avoid eating seafood hair, especially shrimp and crab food. 5, photosensitive disease patients pay attention to avoid photosensitive food. Common photosensitive foods are ashwagandha, purple yew, snow lettuce, lettuce, fennel, amaranth, capers, celery, radish leaves, spinach, cilantro, safflower, rape, mustard, figs, lemon, mango, pineapple, etc. In addition, “photosensitive seafood” including snails, mussels and other shellfish, also contains photosensitive substances, also need to pay attention to.