Frequent mouth sores are a manifestation of recurrent mouth ulcers, in most cases due to the following reasons: First, heredity, if the patient’s parents have recurrent mouth ulcers, the probability of the patient suffering from recurrent mouth ulcers is several times higher than the average person. Second, the autoimmune system has defects, if the patient itself has rheumatoid diseases, or thyroid autoimmune system problems, the probability of suffering from recurrent mouth ulcers than ordinary people, will also be greatly increased. Third, the patient’s mental factors, if the patient is under long-term study pressure or work pressure, bad rest, bad mentality, also more likely to suffer from recurrent mouth ulcers than ordinary people. After suffering from mouth ulcers must actively carry out anti-inflammatory treatment, local can use iodine-containing mouthwash, the whole body can be regulated through the Chinese medicine to completely cure recurrent mouth ulcers.