Question

Why are the veins under my tongue black? I’m still a teenager so it shouldn’t be the stuff my grandma has

Answer 1

it's normal! they just become more dilated in the area where the tongue is, so it appears black.

Answer 2

It is normal for there to be veins visible underneath the tongue, partly because the mucous membrane is so thin and translucent in this region, but where these vessels become dilated and tortuous, they may appear round and black like caviar.