Baby always bite teeth for the following reasons: 1, baby during teething because the teeth feel uncomfortable, often by biting teeth hard to relieve the uncomfortable feeling of the gum department, parents can use teething sticks to relieve the baby to teeth bite each other. 2, baby gastrointestinal function is not good, when the digestive function is not good, usually appear in sleep often bite the phenomenon, parents should pay attention to the baby gastrointestinal digestive function, whether Parents should pay attention to the baby’s gastrointestinal digestive function, whether there is nausea, vomiting, diarrhea and other indigestion, and at the same time to reduce the night before bedtime diet, eating too much will have this situation. 3, when the baby’s teeth bite relationship is not good, often have the phenomenon of clenching teeth, you need to take the baby to the hospital stomatology department for examination, to clarify whether the oral cavity problems, to give further treatment can be alleviated after.