Teeth grinding in baby’s sleep may be related to gastroesophageal reflux, intestinal parasites, and emotional instability. Babies appear during indigestion will lead to the emergence of food reflux, reflux to the throat area of the food, will stimulate the baby’s chewing muscles, chewing occurs leading to the occurrence of teeth grinding. Although the living environment is relatively hygienic nowadays, it is impossible to 100% avoid the appearance of parasites, so when the baby does not wash his hands before and after meals, always playing with the soil and so on, it is easy to lead to the emergence of roundworms, which will lead to the emergence of teeth grinding. Emotional reasons also lead to sleep grinding, such as the baby before going to bed after being frightened or too excited, the nervous system excitability increases will easily lead to chewing muscle excitation spasm, thus causing teeth grinding. Baby sleep grinding teeth may also have other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.