An incision in the skin created during a surgical procedure that is typically closed with sutures. Surgical wounds can fall into different categories depending on the risk of infection and where the wound is located. These categories are labeled as Class I, Class II, Class III, and Class IV. A surgical wound may be infected if there is increased pain, a delay in healing, or the presence of pus and/or and an unpleasant odor. These symptoms should be taken seriously and brought to the attention of medical personnel.