Six-year-old children sleep grinding teeth at night to consider the following reasons: First, the common cause is poor oral hygiene, dental caries, gingivitis or chronic pharyngitis, usually to develop the habit of brushing teeth in the morning and evening, rinse mouth after meals, and actively treat infectious pharyngitis and other diseases. Second, some children grinding teeth is related to poor digestive function, it is recommended that the weak spleen and stomach, digestion and absorption can be supplemented with probiotics to regulate the gastrointestinal function, and take Chinese medicine such as stomachic tablets to regulate. Third, there may be digestive system diseases, such as acute and chronic gastritis, gastric ulcer, etc., usually to note whether there is H. pylori infection, the need for standardized anti-H. pylori treatment. Fourth, a small number of children may have intestinal parasitic infections, such as roundworms, pinworms and other infections caused by the need for deworming treatment.