Tongue tie is a condition in which the bottom of the tongue is attached to the floor of the mouth by a band of tissue called the lingual frenulum.
This connection restricts the free movement (range of motion) of the tongue's tip.
The exact cause of tongue tie is not known.
Genes may be involved, because tongue tie is reported more often in some families.
Hall DM, Renfrew MJ. Tongue tie. Arch Dis Child. 2005;90:1211-1215. Review. Erratum in: Arch Dis Child. 2006;91:797.
Wyllie R. Common lesions of the oral soft tissues. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 18th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 312.
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