Why do i have such dark circles under my eyes?

i drink too much water like so i know its not that i dont eat too bad i love fruit i do have allergies but they dont bother me often i get reasonable amounts of sleep i wear mac but idt that has anything to do with it becuz i been having these dark circles since wayy before i even started wearing the mac umm and yeah anyone have any ideas? and also whoever will say its due to heredity is there any cure for this or is it irreversable becuz of genetics ? thankksss <3