a viral infection should not cause knee pain and stiffness. does he have pain in any other joints? if not he should see an ortopaedic md and have it looked at. he should try to excercise as often as he can by walking. he certainly should not try running as running puts a lot of strain on the knees and the joints of the knees. his knee caps may "look" ok but just looking at them isn't enough to tell if he has something more serious possibly needing in the future knee replacement. he should try taking aleve or some otc medication walk as much as he can and consult his physician
can a viral infection cause knee problems? my boyfriend's knees are stiff and painful. his knee caps are ok. thnak you