Answer: Tongue-tie, also known as ankyloglossia, is a condition present at birth that limits the tongue’s range of motion. The tongue attaches to the floor of the mouth with a web of tissue called the lingual frenulum. Typically, the lingual frenulum separates before birth, allowing the tongue free range of motion. With tongue-tie, the lingual frenulum remains attached to the bottom of the tongue, so it may interfere with an infant’s ability to effectively latch during breast-feeding.