Children who clench their teeth during the day need to consider the following aspects of these problems: first, is the child too much excitement, mental excitement is more excited, such children are playful by nature, if the excessive play, too excited, fatigue, or frightened, restless, anxious, will make the excitement of the cerebral cortex increased, the inhibition process is out of balance, inducing the activity of the chewing muscles, and irregular spasmodic contraction, resulting in teeth grinding. Second, the digestive function disorder. If the child eats too much or eats too much, a large amount of food filled in the gastrointestinal tract stimulates the digestive tract, and the nerves transmit these stimuli to the brain, so that the brain cells that manage digestion are excited, and through the role of reflexes, there will also be teeth grinding. Third, there are parasites in the body. There are parasites in the body of the child is very easy to grind teeth, the need to give the child oral deworming drugs to treat the fourth, nutritional imbalance. Some children have partial food, picky eaters, especially do not like to eat vegetables, will form a nutritional imbalance, resulting in calcium, phosphorus, various vitamins or trace elements deficiency, there may be grinding teeth.