Hip impingement, also known as femoroacetabular impingement (FAI), is a condition of abnormal and wearing contact between the ball and socket of the hip joint. This is due to either extra bone growth of the femoral head (CAM) or of the acetabulum (pincer), resulting in increased friction during hip movements and joint damage.
Patients often complain of pain in the groin after prolonged sitting or walking.
Many athletes often describe pain in the groin with deep flexion or rotation of the hip during activity. Occasionally, a popping or clicking in the front of the hip is described. Pain may also radiate along the side of the thigh and in the buttocks.