I have sharp pain on the outside and on the back of my knee, it hurts to squat or to bring my heal up towards my butt. I have been a runner for decades, usually running 20-25 miles a week. This pain has come on gradually, I would stop running for a week and it would usually go away, sometimes it would take 2 weeks of not running. About 6 weeks ago I ran my normal 5 miler and I could hardly bend my knee, it has gotten a little better, but I still have lots of pain on the outer knee and middle toward the rear of the knee. My last run has been 6 weeks ago. There is no way I can run with this pain, and I'm not going to run again because of the fear of permanent damage. Any ideas
Thanks,
Tom H.