Femoroacetabular impingement (FAI) is a painful hip condition that occurs when there is abnormal contact between the femoral head/neck junction and the rim of the acetabulum (hip socket) during certain movements, especially hip flexion, internal rotation, and adduction (inward motion). While hip problems are often associated with older adults, the vast majority of FAI cases occur in active young and middle-aged individuals.
Essentially, the condition results from bone shapes that disrupt the normal smooth motion of the hip joint. The most common type is called cam morphology, in which the femoral head/neck junction is not perfectly round, creating a bony…
