Scar tissue is an elusive problem. I had my right knee replaced in Feb. 2021. Within three weeks I was dealing with excruciating pain, mostly on the lateral side. I tried acupuncture, traditional PT, MFR, genicular nerve ablation-all to no avail. Very reluctantly, my surgeon agreed to open it up again-full incision-to try to identify the source of my pain. Two weeks ago today, he Operated and found significant scar tissue throughout, most especially involving the IT band-the cause of the most significant pain. Two days post surgery I was walking with no aids and climbing stairs. I spend most of my time icing, icing, icing and have started PT with a concentration on ROM. It seems as if scar tissue is a very real complication, that it can appear even years after the initial surgery, and there’s little that can be done to prevent it. I replaced my left knee three months before this left one and had no problem whatsoever. Good luck!