Keratitis is mainly characterized by redness of the corners of the mouth, blistering, cracking, vesicles, crusting, flaking, etc., and bleeding when the mouth is opened. In addition to the dry climate, the lack of vitamin C and B vitamins, such as B2 and other vitamins as the main reason. Arrange more food rich in B vitamins, such as animal liver, lean meat, poultry eggs, milk, soy products, carrots, fresh leafy green vegetables. Keratitis is caused by a large lack of vitamin C. Kiwifruit, a fruit containing vitamin C, is customarily known as the king of vitamin C. You can try to eat a little more kiwifruit. You can also eat some cool fruits, common mangosteen, watermelon, dragon fruit, pears, poppies, strawberries, loquats, tomatoes, bananas, kiwi fruit, melon, grapefruit, oranges, persimmons, mulberry fruit and other fruits.