what is posterior tongue tie
10551. Posterior tongue tie is a congenital anomaly of the mouth and tongue, in which the frenulum, that flap of skin that connects your tongue to the bottom of your mouth, is too short and thick and restricts movement of the tip of the tongue. These are extremely common and generally not severe.abies with posterior tongue tie will have difficult attaining a proper latch on the nipple. Studies have shown that babies with posterior tongue tie will have breastfeeding problems 25% of the time, as compared to only 3% of babies without the condition.