Big Al, I have noticed a few little veins starting to appear. They are very slim looking river snakes, can they get bigger with time? like triple their size? I think they happen ebcause the pushing of the blood inside and they start to form, or maybe they were always therre but they were less developed. I know if I stop withing 5 days I wont see them again.
You'll start noticing an overall increase in vascularity once you start exercising your penis. I don't know about a tripling in size, but it'll definitely look much more vascular an you'll see blood vessels on your penis where you didn't think you had any.