In clinical practice, there is no clear uniform examination of bones, because different methods of examination are used depending on the clinical presentation of the patient and the type of lesion occurring in the bone. If the fracture is caused by a direct or indirect external force, an X-ray of the fracture site can be taken, which will reveal the interruption of the continuity of the fibrous trabeculae and will clarify the diagnosis, as well as the degree of fracture displacement. If a patient is suspected of having femoral head necrosis, a CT examination can be done in the early stage. Through the CT film, it can be seen that there are obvious cystic changes in the femoral head. In the later stages of femoral head necrosis, X-rays can be taken to see the femoral head collapse and the appearance of dead bone formation. If an occupying lesion is suspected in the bone, a CT film or MRI film can be taken, both of which can make a clear diagnosis. Therefore, different tests are needed for different lesions of the bone. After the patient has symptoms, he or she must go to the hospital in time, and the doctor will take the appropriate tests according to the specific clinical manifestations.