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Femoroacetabular Impingement (FAI)
Femoroacetabular Impingement (FAI)
Femoroacetabular Impingement (FAI) is a problem with the hip joint. In a healthy hip, the ball of the femur is smooth and round. It fits perfectly into the hip socket. But with this condition, the ball, the socket or both the ball and the socket are shaped poorly. They don't fit together well. When you move your hip, they rub together harmfully.