To determine whether or not you have OA, your doctor will examine the range of motion in your joint, areas of pain and tenderness, muscle strength, and the stability of the ligaments that hold your joint together.

The doctor may also take X-rays of your joint. In advanced OA, an X-ray will show narrow joint spaces, bony growths called osteophytes around the joints, and changes in the bone of the joint.

If the doctor suspects you have OA of the knee, he or she may order magnetic resonance imaging (MRI) to make sure the pain is not caused by another condition.

Finally, to rule out other types of arthritis in a knee that is inflamed, the doctor may check a sample of fluid taken from the knee (a process called aspiration).

Being diagnosed with osteoarthritis (OA) can be daunting at first. But there are many treatments available today. Work with your doctor to find out which treatment is most appropriate for you.