Children grinding teeth in sleep may be caused by calcium deficiency, gastrointestinal indigestion and other reasons, and need to choose the right treatment according to different reasons. General treatment and medication can be taken to improve the situation. 1. Calcium deficiency: If a child is deficient in calcium or vitamin D, teeth grinding will occur. Dietary supplements rich in calcium, such as shrimp, oatmeal, tofu, etc.; sun exposure in the morning or evening to promote the absorption of calcium. If necessary, take oral vitamin D treatment. 2. Gastrointestinal dyspepsia: If your child has gastrointestinal dyspepsia, it can also cause your child to grind his teeth in his sleep. It is recommended not to eat too much before going to bed, and at the same time to give the child to take gastrointestinal digestion drugs, such as probiotics to adjust the gastrointestinal function. There may also be other reasons why your child grinds his teeth in his sleep, so it is recommended that you go to the hospital in time to have a complete examination to determine the cause of the problem, and then give targeted treatment or therapy. All of the above medications should be used under the guidance of a doctor.