hi, i m a 50 year old white male, 185 lbs, non smoker......I had gotten the flu and pulled a neck muscle in the same week.... with bed rest and lots of ibuprofen my neck is fine..two weeks later, my knees & feet swelled up to a point I couldn t walk... feet have sence returned to normal,, but knees are still swelled....when I wake up....knees are normal size.. 10-15 minutes of being on my feet they swell.........never had this problem before I got the flu......ive had a bloodtest for gout and lymes disease, both came back negative. could too much ibuprofen cause this..??? or your best guess.thank you,clint