Tongue-tie (ankyloglossia) is a condition present at birth. A short, tight band of tissue tethers the tongue's tip to the floor of the mouth. It can affect how a child eats and speaks, and can interfere with breast-feeding.
Symptoms include difficulty sticking out the tongue past the lower front teeth or lifting it to the upper teeth.
The condition often resolves itself. If not, it can be treated with surgery.