Osteonecrosis generally does not heal on its own and usually requires surgical treatment. This is because osteonecrosis is usually caused by trauma, vascular injury, drug factors and other factors that lead to the interruption of blood flow in the bone, manifested by the local formation of dead bone, which will be continuously destroyed by osteoclasts, and eventually form a collapse or damage to the joint. For osteonecrosis, early detection and early treatment are necessary. Because necrotic bone is irreversible, if it causes bone collapse or joint damage, joint reconstruction or artificial replacement can only be used in the end. For some patients with necrosis caused by insufficient blood supply, they should avoid using the joints at an early stage and use medications such as low molecular heparin and prostaglandin E under the guidance of the doctor to improve the local blood circulation. For patients with necrosis, it is necessary to remove the dead bone as soon as possible and do the corresponding bone grafting and fixation.