I have severe osteoarthritis in my right hip, diagnosed last October. I have noticed just above my right knee it sometimes swells up. It's not particularly painful, but feels heavy, if that makes sense? Almost as if it has a weight tied round it. It doesn't happen all the time and the swelling reduces with ibuprofen. I just wondered if this is referred pain? Also, my left hip/groin/knee hurts as well at times. OA in this side was only slight apparently. I walk with a stick most of the time and wondered if this is just as a result of me putting most of my weight over onto that side?