Mouth ulcers can heal on their own in most cases, with about a week’s notice. If a mouth ulcer does not heal for more than 2 weeks, it is necessary to go to a regular oral health care facility for examination to rule out the possibility of cancer. Mouth ulcers are common diseases in the oral mucosa department. They are common in the elderly and children who have low body resistance, or those who are weak after major surgery. Oral ulcers can be improved by strengthening physical exercise or by taking drugs such as oral transfer factor. Diet can be rich in vitamin B and vitamin C foods, such as apples, pears, oranges, etc.. You can also take iron-containing preparations orally to supplement iron so as not to cause iron deficiency and increase the brittleness of the mucous membrane that can easily induce mouth ulcers. Do not eat spicy and stimulating food. For mouth ulcers caused by mechanical trauma stimulation, the stimulating factor that matches with the ulcer surface can be found, and the stimulating factor needs to be removed in time to avoid cancerous changes. Oral ulcers usually heal spontaneously in two weeks, but for those that do not heal for more than two weeks or for a long time, appropriate biopsy is needed. For severe pain in the mucosa, pain can be relieved by cautery under local anesthesia followed by iodine glycerin. The treatment of mouth ulcers is based on oral transfer factor, etc. or strengthening physical exercise to improve immunity, followed by local cautery for pain relief of the lesion.