CausesBy Mayo Clinic staff
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. Why this happens is largely unknown, although some cases of tongue-tie have been associated with certain genetic factors.
When tongue-tie is present, it's apparent at birth.
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- Beatty CW (expert opinion). Mayo Clinic, Rochester, Minn. March 11, 2012.