Recently, I’ve noticed that my child’s teeth are clenching when he sleeps, and sometimes I can hear the sound of upper and lower teeth rubbing together, which is very unpleasant. Is this a sign that your child is grinding his or her teeth? Why do children grind their teeth at night? Why do children grind their teeth at night: 1, parasites: roundworms because parasites in the intestinal tract, constantly running, stimulate the intestinal wall to make intestinal peristalsis accelerated, causing indigestion, so that the child sleeps uneasily at night and cause teeth grinding. In addition, children with pinworm disease because the female worm crawling to the anus at night to ovulate, causing children to sleep uneasily will also occur teeth grinding phenomenon. 2, dietary disorders: some children eat too much dinner or too much snacks after dinner, the accumulation of food caused by the gastrointestinal tract in the child’s sleep also have to work, resulting in spontaneous contraction of the facial chewing muscles, teeth will be grinding back and forth. 3, the child is too excited during the day or too nervous, anxiety, resulting in sleep after the cerebral cortex is still in a state of excitement, so the phenomenon of teeth grinding. 4, oral problems: poor dental development, such as wrong jaw, high cusp, uneven bite surface, dental caries or periodontitis can cause teeth grinding. 5, the child serious malnutrition or a certain nutrient deficiency, endocrine disorders and perverse reactions can also cause teeth grinding phenomenon. For the phenomenon of children grinding their teeth at night, there are generally the following three hazards: 1, affect the periodontal tissues Grinding teeth or clenching teeth in patients with teeth grinding force is characterized by a large force, long time, and there is a lateral force, coupled with uneven wear and tear of the teeth formed by the formation of the sharp tip of the formation of traumatic cohesion, resulting in an abnormal occlusal force, so that in the process of mastication periodontal tissues are subjected to the lateral force increases, and periodontal tissues of the lateral bite force is the least tolerant, leading to the formation of an abnormal bite force, so that in the chewing process, the periodontals are subjected to lateral forces. The tolerance of periodontal tissue to lateral occlusal force is the worst, resulting in periodontal trauma, periodontal cavity widening, tissue necrosis, non-specific gingivitis, etc.; in addition, the stronger the contraction of occlusal muscles, the more the roots sink, the greater the periodontal force, and if it exceeds its tolerance, periodontal inflammation can be triggered. Another reaction of periodontal tissues to abnormal biting force is the proliferation of alveolar bone, which can be seen in the alveolar bone cheek side of the alveolar nodule. 2, affecting dental aesthetics Children frequently grind their teeth at night will cause wear and tear of the dental tissues, the shape of the teeth is destroyed, thus affecting the aesthetics of the teeth. 3, affect the chewing function Frequent grinding of teeth at night can cause excessive activity of the teeth muscles, resulting in spasm and fatigue of the chewing muscles of the teeth, affecting the normal chewing function.