Spring is the season of high incidence of facial dermatitis. The causes are complex and varied, and commonly include pollen allergy, light allergy, cosmetic allergy, etc. During the onset of facial dermatitis, the skin is in a hypersensitive state, and patients must immediately stop using all skin care products that can cause allergic cosmetics, cleansers, masks, face oils, moisturizing water and so on. Avoid washing your hair, and even if you do, avoid shampoo flowing onto your face. The above items are mostly irritating most likely to aggravate the skin lesions, or photosensitive, sun exposure significantly aggravates the skin lesions. 2, if the skin is not broken, you can have cold water on the face; if the skin is broken with exudation, it is recommended to use 2.5% boric acid solution wet compress face 10-30 minutes, according to the needs of the condition, 1-2 wet compresses daily 10-30 minutes. 3. Pay attention to sun protection, avoid going out at noon and afternoon when the sun is toxic, and wear a hat and mask when necessary. Avoid eating photosensitive food and drugs during the disease, avoid wind and thermal stimulation, the wind has a lot of pollen, dust, mold, plant lint, animal dander, may also aggravate the lesions; thermal stimulation makes the blood vessels dilate, will certainly add fuel to aggravate the lesions. (For common photosensitive foods, drugs, cosmetics, please refer to another popular science article) 4, no alcohol, no spicy and irritating food, avoid eating fish, shrimp, crab, mussels, snails, seafood, beef and mutton, dog meat, leeks, lettuce, celery, onions and other irritating “hair”, avoid snacking and not fresh food.