Mark, I had swelling in my entire lower leg which appeared about 5 days after my THR. It started to fade around 3 weeks. I worried about this, too, but my OS's office said it was completely normal and would go away in time. Also, my knee and ankle joints were very stiff during this time -- made it hard to do the PT. Well, they were right, all went back to normal after several weeks and my knee and ankle no longer feel stiff. You are still very early in recovery, and this, too, shall pass. Certainly icing and elevating help as does walking. Good luck to you. Keep us posted.
Gail