Joint dislocation of the hip is a common injury to the hip joint. Dislocation occurs when the ball–shaped head of the femur comes out of the cup–shaped acetabulum set in the pelvis. This may happen to a varying degree. A dislocated hip, much more common in females than in males, is a condition that can either be congenital or acquired. Understanding the epidemiology, anatomy, difference between congenital and acquired, screening, treatments, and rehabilitation are all relevant to the topic.