Hello everyone, I have been absent from here for a couple of years and was moving on with life and enjoying my return to activity. However, I need your insights again as something has changed. My right knee is 4 years out and doing well. My left one will be 4 years in March of 2023. It has never been quite as good, but still I have been happy for the most part with much of the time forgetting I have Artificial knees. With the left one I have often wondered if it was as well aligned, just a feeling. My issue now is that a couple of weeks ago, I began to have pain. Not like and injury pain and does not respond like an injury. It feels like it is within the joint. It is persistent. Worsened by use, does not "walk out". Worse under weight bearing situations ( say vs in the pool). I do not perceive instability per say, but I did have a years of painful popping like something soft tissue was being caught with something shifting. I did a bunch of leg strengthening over a year ago ( cubii, pool walking and land walking) and it really calmed down to a rare occurrence. My basic question is does pain from an actual implant issue what is it like? it feels like a light version of my old arthritis pain ( like it is bone pain). I have called my surgeon, but I am stressing I have the beginnings of loosening and as usual, looking for the insights from those who may have experienced this. Thanks in advance for all the help. Overall, my TKR's were a god send and gave me my life back. I was using a scooter and double braced pre-surgery.