Lateral tongue ulcer is a special type of mouth ulcer, and the clinical pain is mainly relieved by oral or topical medication. Patients try not to eat spicy and stimulating, too hard food, reduce local stimulation, and increase water intake, pay attention to rinse mouth after meals to maintain oral hygiene. Both Chinese and Western pharmaceutical preparations are widely used and have good efficacy in treating ulcers: 1. Chinese medicines: such as zinc licorice, which can be applied as a paste on the ulcer surface, and also oral zinc licorice granules, which can promote mucus secretion and epithelial cell regeneration. Watermelon cream spray or six gods pill ground into powder for external use, has the effect of clearing heat and detoxifying, activating blood and phlegm, and promoting the healing of ulcers; 2. Western medicine: the use of cetiolide containing tablets, or oral vitamin preparations. Dexamethasone, gentamicin solution applied externally, or gargle compound chlorhexidine gargle, etc., can promote the healing of ulcers. If the ulcer often recurs, you can also apply topical gluten steroid dacronin film, which can improve the symptoms; 3. Other: such as the use of vitamin C, vitamin B complex, zinc gluconate oral solution, while the application of Chinese medicine made of astragalus, salvia, Huanglian, etc.. You can also apply the oral ulcer paste made of Chinese medicine and western medicine together, which has certain effect on the treatment of oral ulcer and also can reduce the recurrence. In addition, the etiology of oral ulcers is complex and correlated with infection, inflammation, psychological factors, genetic factors and diseases, etc. The causative factors should be searched for as much as possible, and when there are obvious external causes, active treatment of the causes should be carried out to reduce the recurrence of ulcers.