The treatment of oral ulcers is based on symptomatic treatment, mainly including local treatment, systemic treatment, psychological treatment, etc., as follows. 1. Local treatment: local treatment is usually preferred, and commonly used drugs are iodine tablets, watermelon cream and so on. 2. Systemic therapy: for serious oral ulcers, systemic therapy can be used, such as oral prednisolone tablets, azathioprine tablets, injections of transfer factor, thymosin and so on. 3. Psychotherapy: psychological factors have a certain influence on oral ulcers, appropriate psychological guidance can help the treatment of oral ulcers. All the above drugs should be under the guidance of a doctor, it is recommended to go to the hospital to receive regular treatment as soon as possible.