Mouth ulcers can use painkillers, pro-healing drugs, anti-inflammatory drugs or drugs to enhance immunity, etc. It is recommended to go to the hospital for specific examination and treatment, and follow the doctor’s instructions for medication. 1. Commonly used painkillers are narcotic drugs that need to be used under the guidance of a doctor, such as 2% lidocaine, 0.5% dacronine hydrochloride solution and so on. 2. Promote the healing of the drug is mainly epidermal growth factor, for the long time can not heal the use of tretinoin preparations. 3. Anti-inflammatory drugs are mainly gargles or dispersions, such as the common compound chlorhexidine gargle, tin-like dispersions, and so on. 4. Improve the immune system can effectively prevent the occurrence of ulcers and promote the healing of ulcers, commonly used levamisole and so on.