Crush injuries are injuries in which an extremity or other part of the body is compressed, resulting in muscular swelling and/or neurological disorders in the affected body part. Crush is the action of two opposing objects on the body, and compression is the fall of a heavy object from above, and these two injuries often co-exist, resulting in extensive damage to soft tissues, blood vessels, nerves, bones, and other tissues and organs of the human body. Crush injuries often injure internal organs, resulting in gastric hemorrhage, rupture of the lungs, liver and spleen. More serious crush injuries are larger and heavier objects crushing the human body, so that the human tissue and organs undergo extensive damage, such as earth, stone compression injuries. Common causes are as follows: 1, hands, feet by masonry, doors and windows, machines or vehicles and other violent extrusion injuries. 2, explosion impact injury to the body. 3, various causes of landslides burying the body caused by injuries. 4, crowded, stampede caused injury. (1) cerebral contusion: nausea, sensory impairment, high fever, crush injuries, decreased blood pressure, photophobia, hypotension, coma and so on. (2) Re-implantation of severed fingers: crush injuries, ecchymosis, dehydration, edema, swelling of fingers (toes), stiffness and pain of fingers. (3) Colorectal injury: intestinal bleeding, intestinal perforation, nausea, pelvic injury, crush injury, abdominal pain, peritonitis, pressure pain on the lateral abdominal wall or posterior lumbar region, blood in stool, subcutaneous emphysema, etc. (4) Multiple intracranial hematomas: disruption of cranial continuity, crush injury, coma, impaired consciousness, etc. (5) Tibiofibular fracture: cyanosis, crush injury, tibial pain, tibial compression pain, calf swelling and pain, gastrocnemius muscle tear, outer ankle presenting depression, localized swelling and deformation of thigh, etc.