Mouth ulcer treatment mainly includes local treatment, systemic treatment and adjustment of living habits. 1. Local treatment: patients with oral ulcers are recommended to give priority to local medication. The main drugs include lidocaine gel, spray, compound benzocaine gel and other pain-relieving drugs; chlorhexidine gargle, cedirizine tablets and other anti-inflammatory drugs; oral ulcer powder, ice boron powder, watermelon cream and other drugs to promote healing. 2. Systemic treatment: If the symptoms of oral ulcers are more serious or the frequency of recurrence is high, local and systemic drugs can be used under the guidance of the doctor. Systemic medication mainly includes immune preparations such as levamisole, transfer factor, thymosin and vitamin C tablets, vitamin B tablets and other vitamin drugs. 3. Adjustment of living habits: usually pay attention to maintain good oral hygiene, strengthen exercise, enhance immunity, balanced diet, more rest, keep a happy mood. Actively prevent the occurrence of mouth ulcers. Specific treatment should be carried out under the guidance of a doctor.