Extremely Veiny in Legs?

Hi Everyone. I am 16 years old, quite skinny, and pale. Anyways, all of a sudden, out of the blue, I noticed that the veins in my legs were very blue, and very noticeable. They read like a road map! They aren't varicose veins though. Any suggestions on how to get rid of them? Thanks. Oh, and I know that they haven't always been there, they just suddenly appeared.