I have had edema in my left foot for about 8 months now. It started out severe. One day after work, I came home and my foot was swollen. I didn't injure it or anything. I got ex-rays and an mri and no injury could be found. I also got tested for deep vein thrombosis, and it came out negative. I had to wrap my foot every day to keep the edema under control. Eventually it subsided. Now I can get through the day without wrapping it, but it is still present. Any thoughts on what this crazy thing could be? My doctors are stumped.