Necrosis of the navicular bone mainly occurs after a fracture of the navicular bone. After correctly treating the fracture, secondary injury to the navicular bone should be prevented, using mannitol to inhibit edema, and appropriate exercise to improve blood supply to control the risk of necrosis of the navicular bone. Necrosis of the navicular bone does not occur in normal people, but is usually secondary to fractures of the foot causing poor blood supply, resulting in ischemic necrosis of the navicular bone. In case of foot fracture, if it is treated conservatively, the movement of the injured part should be controlled after the reset and fixation, and the joints above the foot, such as the knee joint, can be moved appropriately, so as to prevent the muscle atrophy or muscle adhesion, and to improve the blood supply of the foot. Attention should also be paid to protecting the injured part in life to avoid secondary injury. If surgical treatment, postoperative control of excessive swelling caused by poor blood supply to the foot, you can elevate the affected limb, do the calf muscle static contraction diastole, you can also use drugs such as mannitol to inhibit edema. The above drugs are recommended to be used under the guidance of a physician.