The patella is supposed to track the straightening of the knee and depends on the strength of the quadriceps and the quality of the cartilage on the underside to do its job. After surgery, the capsule of the knee can be very tight and painful. Seek referral to a physical therapist to reduce the pain and improve the knee function. Painful movement of the patella can occur without "injury", .
Answered Mar 9, 2015
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