A bursa is a sac filled with lubricating fluid located between a muscle/tendon and bone, that decreases rubbing, friction and irritation. Repetitive activity is a major cause of bursitis, as the friction over the bursa causes it to be inflamed. However, any condition that causes altered hip mechanics, including low back pain, leg length discrepancy, arthritic conditions, surgery and neurologic conditions may cause subtrochanteric bursitis.

The pain is normally well-localized over the lateral hip, usually with only a minor degree of limp. Often the patient is between the ages of 40 and 60. Less commonly, subtrochanteric bursitis may cause pain radiating to the low back, the later thigh and knee.

Treatment involves correction of abnormal biomechanics. This is normally done with indicated chiropractic adjustments of the low back, pelvis and hip. Custom foot orthotics are usually prescribed to correct foot mechanics and improve gait. Active Release Techniques is performed to the abductor and external rotator muscles of the hip, in order to elongate the tissues and reduce frictional stress. In some cases, chronic bursitis requires a cortisone shot to reduce the amount of localized inflammation, but it should be considered as a last resort.