Bushido-man is right again. After suffering through pain in an ever-increasing number of joints, I finally ditched my Internist at the time (who was treating each joint problem as a separate malady) and went back to see my then retired Internist. She sent me to a Rheumatologist who told me that I not only had arthritis in my feet, knees, elbow, hand and jaw, but also in my shoulders (which hurt but I attributed this to using my arms to save my knees when getting up). After trying the standard medication for arthritis of this type, she put me on a another that has basically eliminated the symptoms. So, I went from taking 2400 mg of Ibuprofen a day just to function and being "barely able to walk" to being able to do TKD. My regret is that I was denied correct treat long enough to suffer permanent damage to my joints. Many arthritis suffers augment their treatment with alternative treatments, I still take glucosimine and chondrotin, but I couldn't function without prescription medication.