The piece of tissue behind your upper lip is called the frenulum. When these membranes are too thick or too stiff, they can keep the upper lip from moving freely. This condition is called a lip tie.
A lip tie is a condition in which the piece of tissue that attaches the lip to the gums is too short, thick, or stiff, impacting lip mobility. Lip tie in babies may make it difficult to get the tongue ...
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