After patella fracture surgery, how to prevent skin necrosis, heel fracture surgery is prone to skin necrosis, which is related to the coarse operation during surgery, which damages the blood circulation of the skin and the high tension of the wound, so the surgical treatment must pay attention to protect the blood circulation of the skin, pay attention to the gentle operation and the appropriate placement of the built-in object. After heel fracture surgery, we should also pay attention to several points: 1. we should pay attention to the wound should not be compressed or pressure bandaged too tightly, causing blood circulation disorders. 2. we must prevent wound infection, which can lead to necrosis of the skin flap. 3. we should pay attention to the surrounding environment, especially the patient himself quit smoking and the temperature is appropriate. 4. we should pay attention to the patient’s thermal insulation and pay attention to the patient’s blood viscosity should not be too high, and when the blood viscosity is high, we should Pay attention to the application of anticoagulant drugs and vasodilator drugs to prevent the impaired circulation of the flap and prevent necrosis of the flap.