Drugs for the treatment of mouth ulcers are mainly divided into two types of local topical drugs and internal drugs, the former including: analgesic, anti-inflammatory, healing-promoting class, the latter including: immune class, trace elements and so on. Local topical drugs are mainly the following categories: 1. Analgesics: Since mouth ulcers can have erosive surfaces and even significant pain, drugs such as lidocaine gel can generally be used to relieve pain. 2. Anti-inflammatory: for the treatment of mouth ulcers, you can also use chlorhexidine mouthwash and other drugs to relieve. 3. Promote healing: oral ulcers can be used to promote the healing of ulcers, such as oral ulcer powder, cediriodine tablets and other drugs. Systemic medications are mainly of the following types: 1. immune class: for recurring ulcers, it may be due to low immunity, so you can take transfer factor oral liquid, immunosuppressants and other drugs to treat. 2. Trace elements: For the problem of recurring ulcers caused by lack of vitamins in the body, it is necessary to go to the hospital in time for trace element testing and timely supplementation of vitamin C and so on. All the above drugs should be used in accordance with the doctor’s prescription, do not use drugs without authorization.