Repetitive friction between a part of your femur called your greater trochanter and your IT band can irritate your trochanteric bursa. Repetitive movements of your upper leg or sudden impacts, such as falling on your hip, can also irritate your bursa. Additionally, some people develop trochanteric bursitis after a total hip replacement. This can happen if a surgeon increases the tension of the muscles too much and causes the trochanter — a bony growth that attaches muscles to the upper part of the thigh bone — to impinge on the IT band.