If you are experiencing the symptoms listed above, you should consult your doctor.
Your doctor will take a detailed history of your pain and other symptoms. A physical examination will also be undertaken to assess where your pain is, how swollen the knee is and how the knee moves. It is likely that your doctor will also examine your hip and back to ensure that your pain is not being referred from one of these areas.
If your doctor suspects knee arthritis is the cause of your symptoms, you will be referred for a knee x-ray. This is still the best test to determine how much damage has occurred to the cartilage and bone of the knee joint. Your doctor may send you for a magnetic resonance imaging (MRI) scan or computed tomography (CT) scan if there is any doubt as to what is causing your symptoms.
If Rheumatoid (or another inflammatory) arthritis is suspected, your doctor may arrange some blood tests to help confirm that diagnosis.