The squeaky teeth grinding of children during the day may be caused by physiological factors such as teething, or pathologic factors such as periodontitis. 1. Physiological factors (1) Children are in the stage of teething, there is an itchy feeling in the teeth during teething, which leads to unconscious grinding of teeth. (2) The surrounding temperature is cold, the child’s body fluid circulation is poor, easy to appear chills, thus the symptoms of teeth grinding. (3) Children are in a state of long-term stress and mental tension, which leads to excessive excitation of the central nervous system, thus resulting in the above phenomenon. 2. Pathological factors (1) Periodontitis is induced by heredity, plaque infection and other reasons, thus causing itching and other symptoms. Children grind their teeth to relieve itching. (2) Vitamin deficiency and lack of calcium and other trace elements due to picky eating. This leads to dystonia, which causes the symptom of teeth grinding. (3) The child’s jaw joints develop abnormally and are easily dislocated, and the patient will have the sound of teeth grinding when he clenches his teeth. It should go to the hospital in time for consultation and symptomatic treatment.