The symptoms of intestinal perforation are clinically known as acute diffuse peritonitis, which is also commonly described as a plate-like abdomen. The patient’s symptoms are mainly severe abdominal pain, which can be accompanied by nausea, and further progression can result in chills, fever, and even infectious shock. Because the intestinal contents enter the free peritoneal cavity after intestinal perforation, chemical peritonitis can form. There are a large number of bacteria in the intestinal cavity, which grow and multiply after colonizing the free peritoneal cavity, producing a large amount of endotoxin and exotoxin into the blood, causing bacterial peritonitis. This time, it manifests as pressure pain, rebound pain and abdominal muscle tension in the full abdomen, so it is called plank abdomen. It also causes paralysis of the gastrointestinal function, which can manifest as nausea and vomiting symptoms, and because bacterial toxins enter the bloodstream, toxic symptoms of chills and high fever can occur.