Mouth ulcers, commonly known as mouth sores, are a common ulcerative injury that occurs in the oral mucosa, and mouth ulcers are painful and burning when they flare up. Treatment should be done from the following aspects: First, a light diet, more vegetables, fruits, avoid heavy, less spicy, irritating food. Second, you can usually eat more food containing zinc, such as animal liver, lean meat, peanuts, etc.. Vegetables and fruits are rich in vitamin C, which is beneficial to the healing of ulcers, so increase the intake of vegetables and fruits. Third, quit smoking and alcohol, and avoid coffee and other beverages. Fourth, life should be regular, relax, increase exercise, strengthen physical fitness, avoid overwork, only the body immunity to improve, to stay away from mouth ulcers. Fifth, drug treatment is to choose pain relief to promote ulcer healing drugs such as watermelon cream, pearl powder, ulcers and other Chinese medicine bulk, you can also use relapsed chamomile lidocaine gel, tretinoin ointment, dexamethasone drug film, cidium tablets, recombinant human epidermal growth factor gel, etc..