My knees have been really sore now for quite a few months - had DS2 last november and before then they seemed fine. The left knee is worst with a e pain in the back as well as the joint. They are most painful when I get up from crouching - they just feel really sore. I'm in good health my otherwise and normal (ish) weight. The only problem I've ever had with knees otherwise is as a child 30+ years ago when I had osteochondritis(sp?) in my right knee - I was told it was a hairline fracture in the knee cap caused by growing too quick (not sure if thats true!). Anyway my sore knees are really getting me down - any ideas as to what it is greatly welcome.