If a tongue ulcer is caused by irritation such as sharp tooth tips, the irritant needs to be removed and the affected area cauterized and coated with iodine glycerin to relieve the pain. The first thing you need to do is to find out the cause of the ulcer on your tongue and treat it symptomatically. The most fundamental reason is that the body’s resistance is low and bacteria or viruses can easily induce ulcers. It is necessary to strengthen physical exercise and, if necessary, to take oral transfer factors to improve immunity. Tongue ulcers may be related to nutritional imbalance, such as the lack of vitamin B and vitamin C. You can usually eat more vegetables and fruits, such as apples and oranges, to supplement vitamins. You can eat more iron or zinc-rich foods to reduce the brittleness of the mucous membrane and reduce the onset of ulcers. Tongue ulcers may also be related to the presence of local irritants. Traumatic mouth ulcers can form from unevenly worn teeth with residual crowns and roots, or from sharp tooth tips. This condition requires complete removal of the irritant to get better, otherwise the irritation may cause cancer if it persists. After removing the cause of tongue ulcers for symptomatic treatment, those with severe pain can be cauterized under local anesthesia to promote healing of the ulcer, followed by surface application of iodine glycerin to relieve pain. Therefore, ulcers of the tongue can be treated by improving the immune system, strengthening nutrition, removing the causative factors such as irritants, and then applying iodine glycerin to the affected area to relieve pain.