Mouth ulcers are superficial ulcers that occur on the oral mucosa and are between the size of a grain of wheat and a soybean. They are round or oval in shape, with a concave ulcerated surface, surrounded by congestion, and can be painful due to irritating foods, and generally heal spontaneously in one to two weeks. Mouth ulcers recur periodically and are medically known as “recurrent mouth ulcers”. It can occur once a year or once a year for several years, or once a month, or even alternating old and new lesions. Mouth ulcers are often painful and affect normal life. So how to treat mouth ulcers? Commonly used methods are the following: 1, cautery method: for light mouth early, with 10% nitric acid cautery ulcer surface can be; 2, film: is the use of film on the ulcer surface, commonly used film are: glutamate ulcer film, chrysin ulcer film, chlorhexidine ulcer film, estradiol ulcer film; 3, gargle: for the prevention and control of secondary bacterial infection. Such as compound boric acid solution, chlorhexidine solution, oral tylenol gargle, furacilin gargle; 4, containing tablets: its role is similar to that of containing gargle, commonly used lysozyme containing tablets, chlorhexidine containing tablets, Huasu tablets, grass coral containing tablets, watermelon cream containing tablets; 5, local closure: with heavy mouth ulcer base closure, using vitamin B12, flumethasone, prednisolone, transfer factor are available; oral ulcers to a large extent Related to personal physical quality, so to completely avoid its occurrence is unlikely, but if try to avoid the triggering factors, can still reduce the incidence. Specific measures are: 1. pay attention to oral hygiene, avoid damage to oral mucosa, avoid spicy food and local stimulation; 2. keep a relaxed mood, optimistic and cheerful, avoid things and anxiety; 3. ensure sufficient sleep time and avoid over fatigue; 4. pay attention to regularity of life and balanced nutrition, develop certain defecation habits and prevent constipation.