I fell and scrapped my knee pretty badly, over the summer. It healed well. Ever since then, my lower leg, ankle, and foot are getting very swollen-even pitting edema, once.This edema does not happen when I walk, my normal, 3-5 miles/day. It only happens on the leg (left) with the knee injury (over the summer). Now, on my front left upper leg there's an area of red splotching (?mottling?)-big splotches. The skin over this area is dry and kind of rough. There is no pain. There was pretty bad pain, one day, in my left calf. I'd stretched my calf muscles, the day before the pain, pretty much, so, attributed the pain to this. I walked less because of this and the lower left became edematous, again.