@catheem The knee replacement (right knee) is only painful going up and down the stairs. It’s also a bit painful and stiff if I have to get up from a sitting position. I used to do a lot of exercises on my yoga mat but it’s difficult to get up from the floor using the replaced knee or the left knee, which is bone on bone. Have you had an MRI on your knee? That should show wherever there is damage in your knee. If the only problem is your kneecap, I’d get another opinion or two. All of my best wishes to you.