When the wound is infected with pus, it will lead to local symptoms such as redness, swelling and pain around the wound, and serious pus will lead to systemic symptoms such as fever. 1. Local symptoms: The presence of infected wounds with pus is usually due to local inflammation caused by bacterial or viral infection of the wound. As the inflammation stimulates the peripheral nerves of the wound, it will lead to redness, swelling and pain around the affected area, and when an abscess is formed, the pressure pain is obvious and there is a sensation of fluid waves. The patient’s wound will also have poor healing and pus discharge. 2. Systemic symptoms: If the patient’s wound is seriously infected, or the infection is not effectively treated for a long time, it will trigger the patient to develop systemic symptoms, such as fever, fatigue and so on. Caused by wound infection, fever is usually above 38.5℃. In severe cases, bacteremia, sepsis and so on will occur. After the wound becomes infected and septic, it is necessary to seek medical treatment in time to avoid aggravation of the condition.