There are many reasons for children to grind their teeth, and it is a normal reaction to be in the teething stage between the ages of 6 and 13 years old, when teeth grinding sometimes occurs. If after the teething period still appear night grinding symptoms, is a pathology, need to do specific corresponding examination to determine the treatment plan. 1, parasitic problems: the toxins produced by intestinal roundworms can stimulate the intestinal tract and make the nerves excited, resulting in teeth grinding. 2, too excited: children play too much leading to excitement, depression, restlessness and anxiety, these can lead to night grinding teeth. 3, certain diseases: malnutrition, individual missing teeth and some congenital diseases may trigger night grinding. 4, the lack of trace elements: lack of calcium, phosphorus, vitamins and some trace elements can also cause night grinding teeth. Parents should pay attention to children’s teeth grinding at night and observe the growth and nutrition of children in time, and treat the oral cavities in time, focusing on excluding intestinal roundworm disease and malnutrition and trace element deficiency. Parents need to pay attention to the child’s teeth, regularly go to the hospital for dental check-ups, develop good habits of brushing teeth, and maintain oral hygiene. Systemic diseases should be diagnosed and treated as soon as possible in order to help the growth and development of the child.