Recently had an op on a swollen knee infection. Where the bacterial infection came from the Doctors could not say as I had not had any injury to the joint. That was 4 weeks ago and although the swelling has been reduced my knee is still swollen and I cannot resume my normal activities such as running and aerobics etc. I have finished a course of antbiotics and had some physio but nothing seems to be happening . Could you give some hope that things will improve ? ! Thanks in anticipation of your reply.