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Hello, this is Dr. David. I am reviewing your question now and will be with you momentarily.
I am sorry you are having knee pain.
do you have pain at rest or when walking or bearing weight?
do you have any redness or swelling of the knee?
the best way to know what is causing the pain is to see a doctor and get an exam and xray of your knee
you could have loosening of your hardware or an infection in the knee