1. blue veins
[reticular veins] represent a normal skin variation, unless the veins are enlarged and might represent some other problem with the vein circulation.
2. Is she losing weight,which can make veins more noticeable, or could be hormonal
3. A Phlebologist (Vein Specialist) can certainly help you to make a diagnosis one way or the other.
PS: An exception is mold on hard cheese, as some cheeses are eaten only after they become moldy! Blue cheese gets its flavor from the veins of blue-green mold in it.