Although I don't have as much experience as the others in this conversation, I would like to mention another possible avenue of help. If you can find a good physiatrist, they could help figure out if the pain is from the new knee appliance or from the tendons, ligaments, muscles, bursae or nerves in the leg around the joint. The source of the pain matters. 30% of knee replacement patients suffer with chronic pain afterwards, according to the physiatrist who is curing mine. Any or all of those soft tissues can be injured or stressed to the point of chronic inflammation and pain by the trauma of the surgery. They can also sustain injury after the surgery because your posture, leg length, and the alignment of the joint changes. Everything from your foot up into your back is forced to adjust, and the process of adjusting can put additional strain on surrounding tissues. I have struggled for 11 months with this soft tissue pain, which was aggravated by an injury from a bad physical therapist. In my own case it turned to be knee bursitis, inflamed ileotibial band and hip bursitis along with 4 back muscle strains. The back gradually healed with stretches and correct posture, but the rest of the leg got worse over time. Four doctors missed the diagnosis. The fifth one got it right and 4 sonar shockwave treatments have finally fixed the leg. I can exercise, and go up and down stairs, and even sleep at night. So, keep trying different doctors till you find one who wants to look at all the options. If you do have a soft tissue injury you might want to consider trying shockwave. No needles, no knives, no therapy, BUT insurance does not cover it yet. Prices here on the west coast start at around $250 per session. I hope you find some help. No one should have to live with chronic pain after surgery. Good luck.