When I was in my pre school year I've noticed I have a three inches light blue vein on the right side of my knee, at that time I was so conscious about it. But as I grew older i forgot about it, and had been receiving complement for having "beautiful legs", For the past 11 months I've been wearing about 2 to 3 inches shoes, almost 4 x a week. Then just two weeks ago, I've noticed that the light blue veins on my right knee is getting started to protrude..