Welcome, nene! I hope you enjoy Disaboom. I have fibromyalgia and have swelling in my feet/ankles/legs/knees (sometimes hands) all of the time. It gets so bad that I can't hardly walk. I take a water pill daily, which is a part of my BP (hypertension) management. It makes a significant difference in my swelling. Also, my sodium intake makes a big difference. I really try to watch the salt.....even rinsing my canned vegetables before heating them up.
Summer had some really good advice. In a way, my swelling is related to kidney function as well. Since you and she have the same disability, she may understand your particular situation better than some of the rest of us.
My husband also has problems with swelling in his feet. He has to sit at his job (dr. orders), he's not in a wheelchair, but the lack of moving around would be similar. He has severe sleep apnea and must have oxygen through his breathing machine at night. When he has a good night on the machine, it really helps with his swelling. (for him the inability to breathe and get oxygen normally causes his heart to work too hard, thereby causing the swelling.)
So, the swelling can be from a number of causes. My husband had to see a cardiovascular doctor as well. Honestly, for him, it wasn't that helpful, as they discovered his circulation is fine......the pulmonary doctor was the most helpful.
Good Luck in discovering what is the cause of your swelling. It isn't fun going to all these different doctors to find answers,
squabwithfibro