Children grinding their teeth at night need to be treated according to the cause of the disease, which varies from cause to cause. Generally children grinding teeth at night is mainly caused by permanent teeth growth, malocclusion, lack of nutrition and other diseases. 1. Permanent teeth growth: the child’s permanent teeth start to grow, which may lead to nighttime teeth grinding, and it is recommended to use the bite plate for treatment. It reduces the reduction of bite height and prevents over-activity of masticatory muscles, thus relieving the symptoms of nighttime teeth grinding in children. 2. Malocclusion: Malocclusion refers to the abnormal biting relationship between the upper and lower jaws, which leads to nighttime teeth grinding. It is recommended to go to the hospital, under the guidance of specialists, wear orthodontic appliances to align the teeth to relieve the symptoms of night grinding. 3. Nutritional deficiencies: Children may suffer from calcium or vitamin deficiencies during the growth process, which may lead to nighttime teeth grinding. It is recommended to go to the hospital in time to find out the cause of the disease, under the guidance of the doctor, appropriate amount of vitamins and calcium and other nutrients, such as fruits, vegetables, eggs, milk and other foods, so as to achieve a balanced nutrition, so as to relieve the symptoms of children grinding their teeth at night. In addition, if the child is too tired during the day and in a state of mental stress, it may cause the child to grind his teeth at night, and it is recommended to consult a doctor in time to identify the cause of the disease and timely treatment.