The dislocation of femoral head (ball) from the socket (acetabulum) is known as hip dislocation. The cause of dislocation can be any injury or a trauma. Dislocation of the hip is a dangerous and extremely painful condition and also a medical emergency. It can also damage the surrounding structures like ligaments, vessels that carry blood, muscles, and other structures. AVN of the hip is a severe complication of dislocation. Dislocation leads to sciatica nerve damage.
This is an emergency condition and needs to be fixed within 6 hours, otherwise it will damage the other structures like blood vessels and can disturb the flow of the blood towards the leg and foot.