What Causes Swelling In Foot After The Cartilage Transplantation From Knee To Ankle?

I'm female 33 yrs old, first broke ankle in 2006, had an cartlidge transplant from knee to ankle (didnt take), then had ankkle fusion in june 2008 , last summer had surgery to fix nerves and blood vessels in foot, now having alot of pain and swelling on the top and bottom of the middle of my foot. I tired putting it up , ice, meds like celebrex,umtram,and other pain meds....