Child patients mostly show symptoms of teeth grinding, the common causes are mainly: 1, malnutrition, picky eating and excessive growth during childhood can cause symptoms of malnutrition, such as anemia, lack of vitamins, etc.. The symptoms of grinding teeth may be related to the lack of nutrients. 2, intestinal parasitic disease, parasites living in the intestine, absorbing nutrients from the body, resulting in reduced nutrient absorption. Common clinical symptoms include teeth grinding, abdominal pain, itching near the anus, facial whitening, etc. 3, the nervous system is not well developed during childhood, and excessive psychological stress in children can cause uncomfortable symptoms such as teeth grinding and sleep talking. Usually strengthen nutrition, do not picky food, pay attention to dietary hygiene, wash hands before meals and after stools, do not eat raw food, should go to the hospital for examination to confirm the diagnosis.