Symptoms of postoperative infection can be categorized into systemic symptoms, which mainly include fever, and local symptoms, which are redness, swelling, heat and pain in the infected area. 1. Systemic symptoms: mainly manifested as fever, after the source of infection acts on the human body, the body will produce an immune response, producing many substances such as white blood cells to fight against the infection, and fever will occur in the process. 2. Local symptoms: Post-operative infection is usually caused by bacterial infection in the wound. Bacterial infection in the wound will lead to local inflammation, mainly manifested as redness, swelling, heat and pain, which will need to do a culture of secretions from the infected area and increase the frequency of dressing changes to keep the wound clean, and if necessary, require reoperation. Postoperative infection is possible serious consequences, must be disposed of in time.