Three years ago I had knee surgery for a torn meniscus, synovial plica, and stress fracture on my tibia and fibula. This was caused from a sports injury. Since then, I still have pain. It get s worse with the change in weather, which I know is arthritis. However, lately it has been in pain from walking up and down stairs and it is very swollen after I take a hot shower or sleep with my heated blanket on. This is the one that confuses me. I just didn t know if you had an opinion as to what this could be.