Tongue-tie, or ankyloglossia, refers to a condition in which the frenulum of the tongue is so shortened that it prevents the tongue executing its normal range of movement. There is uncertainty about the exact frequency with which ankyloglossia occurs, with estimates ranging from below one in a hundred to one in ten infants. This unclarity about prevalence is likely to result from there being no universally-agreed criteria for diagnosing ankyloglossia [1-5]. © 2024 Elsevier B.V., All rights reserved.