Femoroacetabular Impingement
A femoroacetabular impingement (FAI) or Hip Impingement, is a condition whereby an extra bone grows along one or both sides of the bones that form your hip joint; head of femur (top of thighbone) and acetabulum (pelvis). This causes abnormal contact between them which leads to the hip joint not fitting together properly. This causes the bones to rub together and reduce mobility. Over time, this can result in damage to the tissues lining the joint (labrum) and surrounding cartilage, leading to either tears or arthritis.