Tongue ties are are definitely at the tip of our tongues these days! (Pun intended!) The current classification, diagnosis and understanding of the whole body impact is a very new science and certainly one we'll be talking about for years to come. So what exactly is a tongue tie? The structure is technically called a frenum, and there can be seven locations. If any of these frenums restrict the movement or function of the attached muscle, we term it as a tethered oral tissue