Hip subluxation can be judged by the characteristic signs of whether there is a dislocation if an X-ray plain examination has not been performed. This kind of dislocation often has a special position of elastic fixation, the patient cannot move the affected limb, the hip joint cannot be flexed and extended, and there is obvious swelling and pain in the hip joint; at the same time, many patients show that the affected limb is longer than the healthy limb after the hip dislocation. If you have the above symptoms, be sure to have an X-ray plain film examination, which can clearly determine whether there is a possibility of dislocation.