There are many reasons that cause babies to grind their teeth in bed, which may be parasites in the stomach, lack of trace elements, diseases of the gastrointestinal tract, oral diseases, poor teeth clenching, emotional excitement or tension during the day, excessive fatigue from playing, changes in the living environment, etc. If there are roundworms, these parasites are more active at night and stimulate intestinal peristalsis, which will lead to the phenomenon of teeth grinding due to the child’s restless sleep, showing symptoms such as nausea, vomiting, abdominal pain, and grinding teeth during sleep. You need to go to a regular tertiary hospital to check the stool routine, if there is roundworm infection, you can use levamisole treatment. If you suspect a deficiency of trace elements you can go to the hospital to check trace elements. If the diagnosis is zinc deficiency, you can take zinc gluconate oral solution. If it is a calcium deficiency, you can take calcium carbonate, and at the same time get more sunlight, eat more shrimp, milk, etc. In addition, pay attention to the baby’s diet balance, baby sleep grinding teeth is usually related to indigestion, it is recommended not to let the baby eat too much dinner, if the food consumed before bedtime is not easy to digest, sleep may stimulate the corresponding parts of the brain, through the nerve caused by chewing muscle continuous contraction, causing teeth grinding situation. So you need to eat a light diet, do not eat spicy and stimulating food, and eat more fruits and vegetables. It is also important to keep your baby in a good mood and to release negative emotions in a timely manner.