Bulge Near Incision After Tummy Tuck - Miami, FL

I had a tummy tuck done in June 2012 and I saw this bulge as soon as I woke up from surgery. The DR believed it was swelling at first but then realized it was not swelling. He put a needle inside and there was no fluid. Then he tried lipo under local anesthesia in the area but there was no fat. The bulge is still there and in the incision when I touch it there is a hard small mass. I had a scar revision done in April 2013 and he removed the dog ears and made my belly button smaller. The bulge did go down compared to how it was originally but it is still there. I wear my garment all the time with a board on that side. It is flattened down but I notice that if I dont wear it all day the bulge appears again. Now I have no clue what to do or what it can be. Help please!