While babies are growing inside their mama's belly, there is a strong band of tissue located in the center of the mouth that guides the development of the structures of the mouth. It is called a frenum. By the time we are born, this frenum is supposed to recede and become thin, but in about 4-10% of children, this doesn’t occur, leaving the tongue and/or lip connected. Below we discuss why tongue + lip + cheek ties can contribute to reflux in littles!