Hello.. I am a 26 year old male and have been using IV meth for the last few months. Like others had described, I have the hardened knots on my left and possibly on the right as well. I take ibuprofen, drink lots of water every day, and try my best to rotate the injection sites; however, I can't seem to get a clean injetion anywhere other that the two larger veins in the inner elbow of each arm, unless I try repeatedly somewhere else, and half the time have to revert back to my arm andways! Is there another site I am unaware of that may not be common, but just as or almost as easy as the elbow? I always thought growing up I had a very easy vascular system for needles, considering how many times Ive had IV's due to surgeries, etc; but I do believe the nurses actually knew what they were doing!