Hip impingement, or femoroacetabular impingement (FAI), occurs when the femoral head (ball of the hip) pinches up against the acetabulum (cup of the hip). Dr. Alex Johnson, a sports medicine surgeon, and Brian Lee, a sports medicine physician assistant, answer commonly asked questions about hip impingement. Learn more: https//www.hopkinsmedicine.org/ortho. #HipImpingement #JohnsHopkins FemoroacetabularImpingement