Necrotizing fasciitis of the abdominal wall is a necrotizing soft tissue infection that occurs in the abdominal wall. There are many types of pathogenic bacteria, and the infection mainly affects the deep and superficial fascia of the abdominal wall. It can also invade the skin, but not the muscles in the early stage. The disease can occur in any part of the abdominal wall (such as the anterior abdominal wall, lateral abdominal wall, inguinal area and posterior abdominal wall), especially in abdominal trauma or surgical incisions and adjacent areas. It can also be caused by the spread of infection in the buttocks and perineum, and sometimes occurs after a small puncture or insect bite. Necrotizing fasciitis develops rapidly, progresses rapidly, and is a serious condition. Delayed diagnosis and treatment often leads to the death of the patient.