Where did all this fluid come from?

I had heels on twice last week. Maybe I am still feeling puffy from that? I wish I knew what was causing it this week but I can't really pinpoint any specific cause (well besides the obvious) of why I am feeling this way. Such an odd feeling--- this tightness of skin stretched by fluid. But where it is the worst, I can't feel that area.... Going on 5 months and I am not sure that I am going to get that feeling back. Fine, there are other surgically altered areas of my body, the whole lateral side of my left knee for instance, that have no feeling. But it is uncomfortable in a way I can't explain.