Hello, I ve had osteoarthritis for years now, and I ve also been told I have a torn meniscus (sp) in my left knee. Recently, I heard something kind of pop in the left knee, and I m in bad pain, especially if I have to bend and twist the knee, like getting into a car. There is a very sore spot on the outside middle of the knee area, but it doesn t seem to be the joint itself. Do you know what it could be?