Frequent mouth ulcers, clinically known as recurrent aphthous ulcers or recurrent mouth ulcers, can be periodic episodes, self-limiting, the specific cause is not clear, it is generally believed that there is a relationship with the individual physique, the triggering factors may be the following: 1, mechanical damage: the presence of residual roots and crowns in the patient’s mouth, chewing food is easy to scratch the oral mucosa, resulting in recurrent mouth ulcers. In addition, if you eat too fast, it is also easy to cause bites and damage to the oral mucosa, resulting in recurrent mouth ulcers; 2. Immune dysfunction: patients with recurrent mouth ulcers often have immune dysfunction, their own tissue antigen immune response, easily inducing recurrent mouth ulcers; 3. Genetic factors: research shows that when both parents have a history of recurrent mouth ulcers, children The probability of recurrent mouth ulcers is about 80%; when the parents have a history of recurrent mouth ulcers, the probability of children’s mouth ulcers is about 50%; 4, inadequate nutritional intake: when patients have picky eating, partial eating phenomenon, which may lead to the lack of vitamins or trace elements, will also induce recurrent mouth ulcers; 5, mental pressure: when patients encounter some changes or study, work, life pressure increases, mental tension, too When the patient encounters some changes or study, work, life pressure increases, mental tension, excessive fatigue, poor sleep quality is also prone to recurring mouth ulcers; 6, gastrointestinal dysfunction: when the patient has gastritis, colitis, duodenal ulcer, gastric ulcer and other diseases, resulting in gastrointestinal dysfunction, also prone to recurring mouth ulcers; 7, endocrine disorders: women with a history of diabetes, in menopause and menstruation, endocrine dysfunction The recurrence of mouth ulcers is also likely to occur. Mouth often up mouth ulcers, can seriously affect the daily diet and speech, so that the patient’s mood will also be affected, will reduce the quality of life of patients. Therefore, it is recommended that patients should visit the stomatology department of the hospital in a timely manner, so that the doctor can reduce the number of ulcer attacks and the degree of ulcer attacks through local or systemic medication.