For mouth ulcers, I believe that all of us have experienced, should not be unfamiliar. Mouth ulcers attack the ulcer local burning pain, oral mucous membrane erosion, bad breath, lymph node swelling and other symptoms, let us suffer a lot, but can not do anything about it. The incidence of mouth ulcers is more than 10%, and can occur throughout the year. It is not too much to say that mouth ulcers are a worldwide difficult problem. Causes are as follows: 1, more triggers, mouth ulcers is a symptom, its pathogenesis is diverse, some with immunodeficiency, some with the autoimmune response, and some with genetic factors, digestive disorders, and even diabetes can cause mouth ulcers, such as cancerous mouth ulcers, traumatic mouth ulcers, tuberculosis mouth ulcers, and systemic immune diseases. 2, easy to recur, mouth ulcers are also called recurrent aphthous ulcers, or recurrent aphthous ulcers. Then recurrent is it is very characteristic of a place, it is in addition to recurrence, there is a very interesting feature, it has a self-limiting, it is generally in seven to ten days or so, able to heal themselves. 3, the symptoms are more obvious, oral ulcers is the whole layer of oral mucosal epithelial destruction, is a common occurrence in the oral mucosa of ulcerative injury disease, the most common symptom is pain, most often in the inner lip, tongue, tongue belly, buccal mucous membrane The most common symptom is pain, mostly seen in the inner lip, tongue, tongue belly, buccal mucosa, vestibular sulcus, soft palate and other parts of the mucosa in these parts lack keratinized layer or poor keratinization.4, more complications, severe oral ulcers can also cause other diseases, can be complicated with halitosis, chronic pharyngitis, constipation, headache, dizziness, nausea, malaise, irritability, fever, enlarged lymph nodes and other systemic symptoms.5, more varieties, oral ulcers is the destruction of the whole layer of the epithelium of the oral mucous membrane, the most common symptom is pain, most common symptoms are pain, and most common symptoms are pain. common symptom is pain, the most common ulcers are recurrent oral ulcers (recurrent aphthous ulcers), stomatitis-type mouth ulcers, periglottic mouth ulcers, the latter two types of ulcers can seriously affect the patient’s life. Together, these several factors of oral ulcers constitute a worldwide problem that is self-healing but more recurrent.