Hell Dr. For the last three weeks on my left knee and on the right side and little behind the knee started to pain, and I did take X ray the DR. said nothing on X ray, just gave me some pain killer, but this did not stop. The most painful situation is when I try get up from the chair I can immediately stretch my let it pains..like upper and lower part of the legs are pulling each other .. But I remember I had sport injury my left portion of the knee hitting the floor hard during a flying kick karate practise..17 years ago I also have pain which is continuesly remains on the bottom of my right foot just below angle .. some times it is sever and some times is bearable.. it is remains 3 - 4 years no Dr. could find a solution. ^ months ago I had pain on my left elbow as well as on the right wrist.. but those pain no longer there .. Now I just suffering with knee pain