If rehabilitation fails to reduce your symptoms, an injection of cortisone into the bursa may ease your symptoms and give temporary relief of the condition.
An injection of a local anesthetic into the bursa can help your doctor diagnose trochanteric bursitis. If the injection removes the pain immediately, then the diagnosis is probably trochanteric bursitis. Frequently a bit of cortisone medication and novocaine is injected to help treat the condition at the same time.
Cortisone is a powerful anti-inflammatory medication. It can reduce swelling and pain when injected directly into the bursa. The injection will probably not cure the problem. But it may control the symptoms for months.