The symptoms of facial palsy include loss of frontal wrinkles, enlarged eye fissures, flattened nasolabial folds, drooping corners of the mouth, and skewed corners of the mouth to the key side when the teeth are exposed. When eating, food residues are often retained in the gap between the teeth and cheeks on the sick side, and saliva often flows down from that side. The prevention methods of drooping corners of the mouth caused by facial palsy: 1. Avoid spicy and stimulating foods during the period of medication for facial palsy patients. Such as white wine, garlic, seafood, strong tea, spicy hotpot, etc. 2. Apply a hot towel to the face 3-4 times a night, do not wash your face with cold water, and pay attention to keeping your head warm when you encounter cold weather. 3, before going to bed with hot water soak feet, if possible, do some foot massage. 4, appropriate exercise, strengthen physical exercise, often listen to light music, calm and happy mood, to ensure sufficient sleep. 5, need to do more functional exercise, such as: raise eyebrows, puff, eyes tightly closed, open wide mouth, etc.. 6, every day need to adhere to the acupressure points. Adhere to the acupressure points. 7.Eat more fresh vegetables, coarse grains, soybean products, dates, lean meat, etc. 8, usually facial palsy patients need to reduce light source stimulation, such as computer, television, ultraviolet light, etc.