Acute diffuse peritonitis caused by acute gastrointestinal perforation or organ rupture, the peritoneum is stimulated and causes abdominal muscle spasm, the abdominal wall often has obvious tension, or even straight and hard as a plank, called plank abdomen. It is a typical manifestation of acute abdomen, and the whole abdominal muscle is hard to touch, which is a protective reaction to the stimulation of the visceral nerves, hence the name, such as gastric perforation, acute necrotizing pancreatitis, intestinal perforation, acute appendicitis, gynecological diseases, etc. may occur. And what are the causes of platysmal abdomen? Acute diffuse peritonitis due to acute gastrointestinal perforation or organ rupture (Acute peritonitis is a serious disease common in surgery caused by bacterial infection, chemical irritation or injury. Most of them are secondary to peritonitis, originating from infection of organs in the abdominal cavity, necrotic perforation, trauma, etc. Its main clinical manifestations are abdominal pain, abdominal pressure abdominal muscle tension, as well as nausea, vomiting, fever, elevated white blood cells, in severe cases can lead to a drop in blood pressure and systemic toxic reactions, such as failure to timely treatment can die from toxic shock. (Some patients may have pelvic abscess, inter-intestinal abscess, and subdiaphragmatic abscess, iliac fossa abscess, and adhesive bowel obstruction.)