I guess I should ask my GP about it. But I'm being treated for back pain/sciatica and don't want my GP to think I'm a hypochondriac either. It took me years to convience him that I didn't just have "allergies". Finally another doc discovered I had a deviated septum. Had surgery for it and I'm much improved but still not as good as I'd like. Took me 9 years to get him to send me to the pain clinic to get the injections. Hmmm, maybe I should start asking about the knee now....maybe he'll take me seriously in a couple of years.