The deep lingual veins are a group of veins that run through the tongue and surrounding areas, and form a system that helps maintain blood supply to the tongue and other surrounding tissues. Even though not everyone knows about veins, they play an important role in the functioning of our body. Not well studied and understood so far, but without them our bodies could suffer serious health problems, some of which can be fatal. In addition to their physical component, these veins are also important as vessels and ducts for the exchange of substances between various tissues and organs. This article will discuss the anatomical features of this group of veins, their significance, structure, functions and diseases associated with them.