Treatment is similar for both arthritis and bursitis. Nonsteroidal anti-inflammatory drugs, such as ibuprofen or naproxen sodium, ice, rest and steroid injections make up the primary course of therapy. If infection is the cause, treatment with antibiotics is necessary. For severe cases that last longer than a few weeks or if you have major swelling, the bursa may need to be drained. In rare cases, removal may be necessary.
Return to your orthopedist and ask for an X-ray if you have not had one already. Bursitis will not show on the film, but other causes, such as arthritis, can be ruled out. Given your age, the most likely cause of your bursitis is age-related osteoarthritis. If you like, get a second opinion from another orthopedic specialist. You can then compare the results and go from there.