I had dropped something under my bed, and when I got down on my knees, I felt this sudden, tearing, and then burning
pain. I straightened my knee
immediately, rubbed it, and in a few minutes it felt better. It's been a couple of weeks since the fall, and anytime I put pressure on my knee when it is bent, I again feel tearing and burning. If I walk with my knee pretty straight, it isn't bad.