Clinically more common mouth ulcers are mainly recurrent aphthous ulcers, easy to grow mouth ulcers are mainly due to mental factors, environmental factors, genetic factors, endocrine factors and so on. 1. Mental factors, if you often have too much pressure, emotional fluctuations, may lead to mouth ulcers. 2. Environmental factors, if usually often in the pollution of the environment or often in contact with toxic and harmful substances, may induce mouth ulcers. 3. Genetic factors, mouth ulcers have a certain heredity, if someone in the family has had mouth ulcers, the possibility of mouth ulcers in the offspring is higher. 4. Endocrine factors, if the body’s hormone secretion disorders, endocrine disorders, may lead to mouth ulcers. If you already have mouth ulcers, you need to consult a doctor in time for examination and treatment.