I had surgery on my arm about three months ago when I broke my left radial and ulna, where I had plates and screws put in to correct it. A little while ago I had a significant amount of painful swelling, almost in a bump, at the one part that seemed as if it were at one of the plate ends. It went away, but I m experiencing it again and its quite painful to even make a fist or touch my arm, and its also pounding and occasionally stinging, and its a big swollen bump in the same area. I put ice on it which helps the swelling but not the pain. What could be causing this and how do I treat it or prevent it from doing this yet again?