I am female, weigh 130 lbs. I have graves disease and had thyroid surgery in 2003. I am on Levoxyl, I also have high blood pressure and am on medication for that. I have swelling in my hands and feet and also knots on the top of foot and big toe. I have swelling in my hands as well and pain in knees and hips. I have been tested for RA and Gout and both were negative. What could be causing the pain, swelling and knots?