its in the crook of my right elbow.. just above where the two veins meet and start to head up toward the bicep. ive only shot in that spot a couple of times because its easy for me to miss, but i shoot in the veins right below it and im just wondering what caused this and if its a cause for concern. I've heard about getting lumps from Tar or Pills, but I've never done tar and never made it a habit to shoot pills so im kinda confused. Any Thoughts? EDIT: also, the big vein the the crook of my left elbow has been kinda fucked for a little bit now. IT still comes out but everytime i hit it, it hurts and gets bruised, and even though i register and am in the vein, i always feel the shot going in and it always at least partially misses. so im wondering, is this vein just full of holes that arent gonna fix themselves or whats the deal?