8 mos post-op, my knee is swollen, painful, and kneecap clicks like a keyboard when tapped. Surgeon never had a patient with this problem before. I'm to have metals allergy testing... in 8 more weeks. That doc is very busy. I have complete flexibility - bends as far as other knee. Recently started swimming and other water exercise. I do some land exercise, but it all results in searing pain all day & night. Standing causes pain. Everything causes pain. I don't take pain meds except for Rx topical anti-inflammatory cream. My life is on hold. Am an active 70 yr old woman, not overweight.