When the pain is on the side or outside of the hip, this may be from muscles rubbing on the trochanter. This is also known as bursitis. Sometimes it feels like something is snapping in and out of place on the side of the hip. This is usually a muscle sliding over the trochanter and does not mean that the hip joint is going in and out of the socket. Trochanteric bursitis is a common cause of hip pain and is usually treated with anti-inflammatory medicines, cortisone injections, and physical therapy.