My wife’s knee started swelling on-and-off approximately 3 years ago in 2001. Doctors could not find anything wrong with her knees or any blood disorders. She stopped taking her diuretics for a period of time, but this did not help. She stopped drinking beer and wine which seem to solve the problem. She walked 4 miles recently and has not encountered any knee swelling for three months.
Many conditions can cause intermittent knee swelling including most commonly a torn cartilage, osteoarthritis, gout or pseudogout. It is helpful to be evaluated while the knee is swollen.