Teeth grinding in children’s sleep is not a harbinger of serious illness, but is mostly related to oral diseases, mental factors, calcium deficiency and other reasons. 1. Oral diseases: If children’s teeth are decayed, apical periodontitis, pulpitis, etc., it may lead to tooth pain and discomfort, and the situation of grinding teeth in sleep. 2. Mental factors: mental excitement, nervousness, anxiety or overwork during the day, study pressure, etc., can lead to some children sleep grinding teeth at night. Usually, no special treatment is needed, and it can be relieved after adjusting the mind and relieving pressure. 3. Calcium deficiency: For example, patients with rickets will be prone to sleep disturbance and softening of bone deformities, leading to teeth grinding in sleep. There may be other reasons why children grind their teeth in their sleep, so it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.