Cause 1: Allergy is allergic to a certain food, even to a certain toothpaste, which may cause oral ulcers. Countermeasures: rinse your mouth with warm water, and then apply a small amount of raw juice honey to the ulcer surface, repeatedly, and the ulcer was obviously relieved the next day. Inducement 2: Smoking If the smoker's mouth is bitten, many harmful substances contained in nicotine will attach to the damaged oral mucosa, which will interfere with and destroy the self-repair of the mucosa and cause ulcers. Coping: When the oral cavity is damaged, using chewing gum instead of smoking can stimulate saliva secretion, keep the oral cavity moist and promote ulcer healing. Inducement 3: "Anger" Chinese medicine regards "anger" as the cause of oral ulcer, but "fire" also has the distinction of deficiency and excess. Response: Oral ulcer should distinguish between "real fire" and "virtual fire" and use drugs according to symptoms. The ulcer of excess fire is yellow, red, swollen and painful, accompanied by bitter taste, bad breath and constipation. Recommended drugs: Niuhuang Jiedu Tablet, Sanhuang Tablet, etc. The surface of "virtual fire" ulcer is white, accompanied by symptoms such as upset, dry mouth, fatigue and fatigue. Recommended drugs: Baizhi Dihuang Pill, Liuwei Dihuang Pill, etc. Incentive 4: throat lozenges are eaten as sugar. Many people are willing to eat throat lozenges, but if there is no inflammation in the mouth, eating throat lozenges as sugar may cause oral ulcers. Response: Don't eat throat lozenges as candy. Even if you want to eat them, don't always put them in one place. Reason five: lack of vitamins. Lack of vitamins can easily lead to oral ulcers. Response: Oral ulcers are usually caused by the lack of vitamins A and B. You should eat more dark green fruits and vegetables, milk and eggs. Vitamin A should be supplemented, because there is a synergistic effect between B vitamins, so it is recommended to take vitamin B complex.