I am 7 weeks post-op TKR and have developed a sharp knife stabbing pain as of this past thursday. It comes and goes and happens mostly when I am laying down and I am turning on my side with the pillow in between my legs. I have had pain since day 1 but not like this. This is a crippling pain that stops me in my tracks. I was 90 degrees 2 weeks post-op and lost some range of motion leading into week 4. I had a knee manipulation and gained 30 degrees that same day after therapy. The following day I felt like someone hit my quad with a sledgehammer. I am very committed to rehab and working on my own. I can ride the stationary bike fluently and my forced ROM on my stomach was 115 this past wednesday. The stiffness is there everyday and I have to work up to getting loose. I have iced since day one and I have always been told that my knee looks great from a swelling point of view. Im not sure if I am elevating enough though. I went back to my doctor on Friday because of this new pain. He could not explain. He said everything looked great in the x-rays and he did a ligament test on my knee which he said was very good. This pain is located on the right outside lower portion of my knee. It feels like nerve pain. His only explanation was the cortisone shot wearing off after the manipulation. The only thing that helps is a open front knee brace that is supported on the sides that I am only using to sleep in. Im not sure if this is okay to wear. I need to understand where this pain is coming from and is it something to be concerned with.