I had my first knee replaced on August 12, the second one Nov 7 and have complete extension and flexion in both. I am a female 53 years old. My issues are pain under my knee caps when I go from a sitting to a standing position. I live in Delaware and it may be cold related. At night my right knee jerks and clicks a lot no where near the pain I use to be in but still enough to keep me up. My left knee same pain under the knee cap from sitting to standing but no where near the issuses a night and this replacement was done 3 months after my right. Do I need to be concerned.


