Hi, I have been skimming and scanning from beginning of this thread. I didn't know how to find the most recent posting!!! LOL! I also was on another Mayo thread that reviewed allergies to the Nickel and other metals in the TKR implants. I think swelling was one of the symptoms which went away after replacement with non-nickel implants. Have you reviewed that thread? BTW, one posting mentioned that the ceramic TKR implants are a coating which wears away exposing nickel and other metals underneath. Just wondering if you could get some relief by getting tested for nickel and various metal allergies! The thread mentions companies to do testing on your own $$ if insurance won't pay. Thanks for ALL your many postings. Roberta