About 5 weeks ago I fell an landed on my left knee as I was transferring from a wheelchair to a chair. (I am a below the knee amputee in the other leg but not diabetic). I landed on the knee and the hip. I still have swelling and pain around the knee cap. This is the knee that I had ACL /MCL repair back in 2007 when I was hit by car crossing the street. The knee has always been slightly swollen. I suspect I have stressed it being an amputee but I wonder what sort injury I could have this far out. The pain isn t constant. I can walk with my usual walker. I only had 1 instance of instability. I can bend and straighten the knee find. I can climb steps but going down steps is painful.