The baby’s upper lip tie is attached to the root of the tooth, which may be caused by congenital malformation of the lip tie or acquired inflammation. 1. congenital malformation of the lip tie: the baby upper lip tie is stuck on the root of the tooth, this situation is considered to be a congenital malformation caused by the short lip tie, you can take the baby to the hospital, if the diagnosis can be given to the surgery. 2. Acquired inflammation: If the baby has localized inflammation at the upper lip tie, the stimulation of inflammation will lead to thickening of the lip tie, swelling, etc., and the surface looks as if it is attached to the root of the tooth. The baby’s upper lip tie is connected to the root of the tooth, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.