Tongue -tie is the non-medical term for a relatively common physical condition that limits the use of the tongue, ankyloglossia. Lip-tie is a condition where the upper lip has restricted mobility and function. As we develop in the womb, a tight string of tissue called a frenum is supposed to recede and thin under the tongue and lip. The frenum is visible and easily felt if you look in the mirror under the tongue and lip. Everyone has a frenum, but in some people a frenum fails to recede and is too tight, thick, or short and causes mobility problems.
The tongue and lip are a complex group of muscles and are important for all oral functions. For this reason, having a tongue-tie can lead to nursing, bottle feeding, dental, speech, sleep, and solid feeding issues.