Mouth ulcers may be caused by infection, immunity decline, nutritional deficiency and other factors, can be treated through general treatment, topical drug therapy, oral drug therapy and other ways of treatment, but there is no “quick fix” solution. 1. General treatment: pay attention to oral hygiene, brush your teeth in the morning and evening, and rinse your mouth in time after eating, which will help promote the healing of the ulcer surface. 2. Topical medication: you can use lidocaine gel to relieve pain; use compound chlorhexidine solution, esacridine solution and other drugs, which is conducive to the recovery of inflammation; the use of cediriodine tablets, quinclorac and other drugs to astringent sterilization; you can also use recombinant human epidermal growth factor gel, recombinant bovine basic fibroblast growth factor gel and so on. 3. Oral drug treatment: you can use vitamin B1, vitamin B2 and other drugs to improve the body’s self-healing ability; use penicillin, amoxicillin and other drugs to control infection; use levamisole, thalidomide and other drugs to enhance immunity; you can also use zinc sulfate syrup, zinc gluconate and other drugs to supplement the trace elements. It is recommended that patients seek timely treatment, strictly comply with the medical prescription medication.