The baby has a tongue, there are generally two causes: one is the residue after drinking milk, unnecessary to deliberately care for it, generally about 4 months will disappear naturally. The baby’s tongue moss above 6 months old is mainly caused by indigestion. A newborn baby’s tongue is normal if there are no other conditions. It could be residual milk left on the tongue after drinking milk, rinsing the mouth with water can avoid this phenomenon.