Common complications of fracture: 1. internal bleeding, shock. 2. vascular injury. 3. peripheral nerve injury. 4. spinal cord injury, more common in patients with cervical and lumbar spine fractures. 5. visceral injury, pneumothorax, bladder injury, intestinal injury. 6. fat embolism syndrome, fat emboli dislodged is fatal, causing pulmonary embolism, cerebral embolism, all of which can cause serious consequences to patients. 7. osteofascial compartment syndrome , if there is very severe swelling of the limb after a fracture, it is important to visit the orthopedic department.