A hip dislocation occurs when the head of the thighbone (femur) slips out of its socket in the hip bone (pelvis). In approximately 90% of patients, the thighbone is pushed out its socket in a backwards direction (posterior dislocation). This leaves the hip in a fixed position, bent and twisted in toward the middle of the body. The thighbone can also slip out of its socket in a forward position (anterior dislocation). If this occurs, the hip will be bent only slightly, and the leg will twist out and away from the middle of the body. A hip dislocation is very painful. Patients are unable to move the leg, and, if there is nerve damage, may not have any feeling in the foot or ankle area.