Children’s mouth cracks with the lack of nutrients, bad habits, keratitis, etc., there is no so-called rapid recovery methods, need to take supplemental nutrients for the cause, correct bad habits and other methods. 1. Lack of nutrients: when the child lacks vitamins, zinc, iron and other nutrients due to improper diet and picky eating, it is easy to cause cracks in the corners of the mouth. Usually, after adjusting the diet structure and eating more fresh fruits and vegetables, the phenomenon of cracks at the corners of the mouth can be improved. Dietary effect is not ideal for those who can follow the doctor’s instructions targeted application of vitamin preparations, trace element preparations and so on. 2. Unhealthy habits: If the child often licks the corners of the mouth with the tongue, picking the corners of the mouth with the hand, etc., it can also cause cracks at the corners of the mouth. Usually, after the child corrects the bad habits of licking and picking the corners of the mouth, the phenomenon of cracked corners of the mouth can be restored by itself, without special treatment. 3. Keratitis: Diseases can also cause some children to have cracks at the corners of the mouth. Usually can follow the doctor’s instructions to apply 0.1% isacridine solution, 0.05% chlorhexidine acetate solution wet compresses, bacterial infections can be used for gentamycin, erythromycin and other antibiotics, and fungal infections can be used for clotrimazole, miconazole and other drugs. If the contact keratitis patients, can follow the doctor’s instructions for the application of loratadine, chlorpheniramine and other anti-allergy drug treatment. The above drugs need to follow the doctor’s prescription. Parents are advised to take their children to the doctor for examination, and follow the doctor’s instructions after clarifying the cause of the disease. Pay attention to the care of the mouth and increase the amount of water.