 [ Symptoms ] does anyone knows what is this on my baby is mouth [ Disease ] that is normally brought about by disruption or even blockage in the tiny ducts that connect glands in the lips with the surface of the mouth sometimes the tiny ducts are cut and the mucus may not be transferred very well from the lips to the surface and it begins to still into the tissues that are present under the lining of the mouth causing formation of painless bumps it is crucial to consult a doctor as the bump will not heal on its own