stimulating food, can induce mouth ulcers, nutrient deficiencies, such as B vitamins, zinc deficiency, may have a relationship with the occurrence of mouth ulcers; 4, infection: such as viral infections; 5, endocrine factors: such as women’s menstrual period may appear mouth ulcers, and changes in the level of sex hormones in the body have a certain relationship; 6, trauma: mechanical and physical damage when consuming food, resulting in mouth ulcers; 7, suffering from underlying diseases: such as suffering from leukoaraiosis or systemic lupus erythematosus, will often appear mouth ulcers.