Ok folks, I know I haven't been on here for a month or so, but I need some advice. I am having a big problem with my right knee. I had both knees partially replaced in 2010. I developed pretty bad lymphedema in left leg. Left knee hurt a lot longer. Went back after a year and doctor said there were some issues, cement fragment, weak MCL, big space. He told me to exercise to strengthen muscles. I've been going to PT for three months.