Fractures are very common in life, and common reactions after fracture surgery include: 1. Infection. Infection is most common after fracture surgery, especially in patients with contamination or with severe soft tissue injury, if the debridement is not complete, it is easy to have serious infection after fracture, leading to necrosis of bone as well as soft tissue at the fracture site. 2. Deep vein thrombosis formation. It is common after pelvic or lower limb fracture, mostly due to long time braking of the lower limb, slow venous blood flow, and the inability to exercise frequently after the fracture, which puts the blood in a hypercoagulable state and makes it easy to form thrombosis. 3. After a fracture, people who have been bedridden for a long time are very prone to bed sores, which can lead to bed sores due to pressure on the body and local blood supply disorders, and serious bed sores can lead to the occurrence of systemic infections.4. Crushing pneumonia. Some elderly, frail or even chronically ill patients are prone to develop crushing pneumonia after a fracture.