After a traumatic injury, patients often feel swelling, pain or afraid to move around in the injured area, and some patients have a deformity in the injured area that is different from the uninjured area, such as “crooked foot” or “skewed leg”, or when the injured leg is moving around, a sound of bone misalignment can be heard. If you can hear the sound of bone misalignment, which is called “bone rubbing” clinically, you can say with certainty that a fracture has occurred. If there are no two conditions mentioned above, but the injured limb does not dare to exert force, especially the lower limb does not dare to step on the ground, it should be highly suspected that there is no misaligned fracture, especially in children. The most typical hip fracture in the elderly is the so-called “hip shaft fracture” (femoral neck fracture). Some people even go to the hospital with complaints of knee pain and the ability to walk with a limp, and the doctor will definitely check for hip fractures, especially femoral neck fractures. If it is not noticed early and treated as a general sprain, the fracture will make treatment difficult and the patient will be in great pain if it becomes misaligned.