Tongue-tie (ankyloglossia) is a condition present at birth that restricts the movement of a baby’s tongue.
The underside of the tongue is connected to the floor of the mouth by a piece of tissue known as the lingual frenulum. In babies with tongue-tie, the frenulum is thicker and/or tighter (shorter) than usual. This restricts the movement of their tongue and can cause problems with feeding. A tongue-tie can involve the entire underside of the tongue or just part of it.
Tongue-tie is thought to affect approximately one in ten (10%) babies and is more common in boys than girls. About half of babies with a tongue-tie have someone else in the family who also has one.