Dry and cracked lips all year round should be the clinical manifestation of stomatitis. Stomatitis is an inflammation that occurs in the corner area of the mouth at the union of the upper and lower lips on both sides, with chafing and erosion as the main clinical symptoms. The following four types: one, malnutrition keratitis, caused by malnutrition or B vitamin deficiency, or diabetes anemia immune function abnormalities and other systemic factors caused. The elderly do not have teeth, resulting in a short intermaxillary distance, resulting in a deepening of the corners of the mouth area folds, saliva concentration and impregnation of the corners of the mouth, streptococcal and staphylococcal infections, may also be Candida albicans infection, or herpes virus caused by the corns of the mouth. Contact keratitis, usually caused by contact with allergens or toxic substances. Traumatic stomatitis, which is clinically uncommon, is caused by acute trauma or severe physical irritation.