Postoperative complications are the occurrence of another disease or diseases related to the act of treating a disease in the course of treatment of a particular disease.Common surgical complications include:1. Bleeding, postoperative bleeding can occur in the surgical incision, hollow organs, and body cavities.2. Postoperative fever, postoperative fever is the most common symptom.3. Incisional infections, incisional infections appear a few days after the surgery, and have a certain relationship to the patient’s constitution and the nature of the lesion. The incision infection occurs a few days after the surgery, which is related to the patient’s physical condition and the nature of the lesion.4, incision cracking, incision cracking refers to the cracking of any layer or the whole layer of the surgical incision, which can occur in all parts of the body.5, pulmonary atelectasis, pulmonary atelectasis often occurs after major surgery of the thoracic and abdominal regions.6, pressure ulcers, those who need to be bedridden for a long period of time after the surgery are susceptible to pressure ulcers due to inappropriate nursing care or old age and frailty.7, deep venous thrombosis in the lower extremities, the lower extremity of the patients who are bedridden after the operation, the venous return is slow, and Surgically damaged tissues release a large amount of coagulation substances into the bloodstream, all of which can produce deep vein thrombosis.