All children are born with a fold of thin tissue from the under surface of the tongue to the floor of the mouth called frenulum. In some babies it may be tight to the extent that it prevents the protrusion of the tongue out of the mouth.
It can cause problem with suckling and later speech.
There is no medicine that can help.
Majority of the babies get better as they grow, but if feeding is a problem, the tissue can be released by a small operation under general anaesthesia.