Judy,
I've been in a chair for 2 years (I do sit a lot) and on my left "bad" leg, the top of foot is so swollen I can't put shoes on unless they are like ballet flats, nothing up and over swollen top of foot. My PCP has seen swelling before, but doubt in the area of continual wheelchair use. I have been fearful of it bursting open like the weeping edema you describe. Can they drain it with a needle or something? I can't walk, try to move it sometimes and can self-toilet, pivoting to sit using bar. I try to make left foot bear a little weight when I do so. Keep me informed!!