Some children often clench their teeth after sleeping, which not only affects the quality of sleep, but also causes white enamel depletion, resulting in deformation of the dental bed and uneven teeth. Many parents think it is the roundworm in the stomach, they go to the pharmacy without permission to buy deworming medicine for children to eat, but some roundworms not only failed to drive out, as usual, clenching teeth, but also some side effects. In fact, there are many reasons that cause children to grind their teeth at night, in addition to intestinal parasitic diseases (such as pinworm disease, roundworm disease, etc.), there are also some common reasons as follows: 1, dinner is too full, or eat snacks before bedtime. Because of the extra meal so that the gastrointestinal tract at bedtime there is still a lot of undigested food, so that the entire digestive system is forced to “overtime”. The chewing muscles as part of the digestive tract are also mobilized to “collaborate in the battle”, resulting in teeth grinding. 2, the lack of vitamin D rickets children, due to the reduction of calcium absorption, resulting in plant nerve disorders, often appear sweating, night terrors, restlessness and night grinding teeth. As long as the timely supplementation of cod liver oil, calcium tablets and more sunshine, night grinding will soon be improved. 3, there are also many children and children playing very happy, until bedtime. Or watch a tense, exciting or scary animal world film. Due to the vagus nerve overexcitement and teeth grinding. 4, some children like to sleep covered, due to carbon dioxide accumulation will also cause teeth grinding. In short, as long as the above causes are removed, night grinding will gradually improve. For stubborn teeth grinding can be under the guidance of a doctor, before bedtime to take a small dose of benzodiazepine? Zhuo drugs, so that the excitability of the brain is reduced, can inhibit teeth grinding.