In the case of severe tongue ulcers, it is first recommended to check whether it is a multiple ulcer or a single giant ulcer. If it is a multiple scattered ulcers, it is usually not a big problem. Such ulcers are called recurrent aphthous ulcers, which are self-limiting and recurrent in nature and will heal naturally in about 1-2 weeks without special treatment. However, if it is a more serious mouth ulcer, also called perioral thrush, the duration of the disease is relatively long, the defect is relatively large, there may be a large ulcer surface, and even scarring after healing, it is recommended that local application of drugs such as ulcer powder can be used in this case. If the local ulcer exists for a long time, more than 1 month, and has a tendency to increase gradually, it should be taken seriously enough to go to the hospital for inspection and, if necessary, pathological biopsy to exclude the possibility of tongue cancer.