I am a 16 year old male. I box, I lift weights 5 days a week, and have recently changed my diet to one much lower in fat. In the past two weeks i have lost probably 10 pounds. Recently, probably within the last day, there appeared on my right bicep and right forearm a small, smooth textured cluster of blue veins, that does not tingle, itch or hurt. A picture of the bicep cluster: http://imgur.com/ITXrAV7 What is this?