Frequent mouth ulcers can take vitamin B. Vitamin B deficiency is the main cause of mouth ulcers, but there are also mouth ulcers that are caused by anemia or the presence of systemic diseases. Anemia generally requires supplemental folic acid, systemic diseases need to be actively treated according to systemic conditions, such as gastrointestinal dysfunction, the need for gastrointestinal function regulation, and the appropriate use of drugs to use, the routine can be appropriate use of drinkable mouthwash, such as rehabilitation of new liquid, is conducive to inhibit the development of intraoral and gastrointestinal tract flora. Mouth ulcers routinely need to supplement the complex vitamins, including vitamin B, vitamin C, mainly the B vitamins, it is usually recommended to eat fresh vegetables and fruits, so as to avoid partiality, can facilitate the vitamin is conducive to the health of the oral mucosa and the health of the whole body.