There are two types of slipped capital femoral epiphysis, a hip problem. The top of the thigh bone, the femur slips backwards for an unknown reason, usually in teens around the time of puberty.
For some children, the condition doesn’t cause too much of a problem other than some pain and stiffness, which goes away on its own. This is the stable version. Other children develop the unstable version, which is extremely painful. When this happens, it is important that the child not move the leg to avoid further dislocation. The unstable form is usually treated with surgery as the hip must be stabilized with a screw to keep it in place.