Fluid on the knee, also a big issue. Had a school teacher forced into retirement because of among others. Knee pain, As she was scheduled for knee surgery, she asked me if she could have Lyme. I said lets talk. We sat and had an enjoyable visit and talked about life and other ailments that she had experience over a number of years. All red flags for a Tick related illness scenario. (Lyme, Bartonella, Babesia, Mold issues). When the talk was over in about 1 to 2 hrs. Can't remember how long "LYME THING".