I have a hard lump in my left arm near the inner elbow that I have had since a painful blood draw 3 years ago. I have pain that comes and goes and weakness in the arm. I have had an ultrasound and a mri. They showed no muscle or ligament abnormalities. Also, I have developed areas of swelling in my stomach and ribs and in my legs, mostly on the left side. I have gained 20 or more pounds, in spite of eating less and exercising more than I ever have before. My left side of my lower body is beginning to get larger than the right side in some areas. I read about lymphedema, and it sounds like it may be what I have. How do you find out if you have a damaged lymph node, and what can be done at this point . ? I would appreciate any advice l can get, YYYY@YYYY