Mouth ulcers are related to fire. Mouth ulcers are currently speaking, the cause of the disease is not clear. The cause of the disease is related to a variety of factors: first, immune factors. Low resistance can cause mouth ulcers, you can take oral transfer of growth factors for treatment, improve resistance. Second, mental factors. If you are in a highly stressful environment for a long time, it will cause mouth ulcers. Such as learning pressure, work pressure, and so on. Third, environmental factors. Including the work environment, family life environment and social environment. Fourth, from the perspective of traditional Chinese medicine, “fire” can cause mouth ulcers, there is a certain relationship between the two. Fifth, the body’s other reasons: such as gastric ulcer patients easily induced mouth ulcers. Sixth, the lack of trace elements and vitamin deficiency.