3 1/2 weeks ago I had a Morton's neuroma removed from my foot. The subsequent casts have all been removed, but my foot continues to swell, turn dark red, and get hot when I try to stand on it, or get up and use crutches. The doctor tells me this is normal, while at the same time telling me to walk, ride a bike, whatever. I can't walk because of the swelling. Why is it doing this, and what can I do to help? (I'm 50, in decent shape, weigh 150, don't drink or smoke)