Allergies: contact lenses, skin care and hair care products and cosmetics such as facial cleansers, hair dye, shampoo and facial grease 2, excessive use of computers: can be due to visual fatigue, transient reduction, ray stimulation caused by dry eye disease, long-term residence between the air conditioning 3, “fire”: that is, caused by systemic diseases: such as menopause rheumatism, mouth 4, inflammation: keratitis, chronic conjunctivitis and other chronic diseases can cause a decrease in tear secretion, resulting in eye surface loss 5, neurological disorders: such as facial palsy resulting in incomplete eyelid closure, visual fatigue resulting in eyelid movement disorders. Note in the treatment: 1. Dietary conditioning: eat less spicy and stimulating foods such as hot pot, onion and garlic, fried foods, and eat more foods rich in vitamin A, such as animal liver, carrots, spinach, tomatoes and fruits, etc. 2, symptomatic conditioning: such as less use of computers, less stay between air conditioning, treatment of eye disease, menopausal syndrome and systemic pathologies. 3, pay attention to moisturizing: such as insisting on hot compresses for the affected eye (wet and hot compresses). 4, adhere to the treatment: dry eye disease is a long process, lingering difficult to cure must be combined with the treatment of the symptoms and the root cause, the symptoms should continue to regulate treatment after improvement.