When mouth ulcers appear, it is recommended to supplement B vitamins, vitamin C vitamin E, etc. Usually B vitamins are the main ones, especially vitamins B2, B6 and B12, and they can be supplemented with multivitamins. In addition, it is recommended to take appropriate supplementation of trace elements, such as iron and zinc preparations, and also calcium preparations, etc., to regulate the symptoms of anemia. If there are systemic diseases, such as diabetes, heart disease or hypertension, timely control is recommended. If you have gastrointestinal disorders, it is recommended to actively treat them, so that the flora in the mouth can be regulated and mouth ulcers can be avoided. If there is too much plaque and calculus in the mouth or caries in the mouth, it is recommended to actively remove them, and periodontal scaling and scraping can be done to repair the caries, so that the flora in the mouth can be regulated and mouth ulcers can be avoided. At the same time, it is recommended to improve the body’s resistance, and it is possible to take oral medicine to enhance the immunity.