Peritoneal tear may be caused by trauma, rupture of abdominal aortic aneurysm, hernia, etc. 1. Trauma: sharp cuts or excessive exercise may lead to peritoneal tears. 2. Abdominal aortic aneurysm rupture: refers to abdominal aortic aneurysm expansion, that is, the local blood vessels like a balloon bulging, expansion, manifested as a palpable abdominal pulsating mass, ultrasound, angiography and other vascular imaging can easily find abdominal aortic aneurysm, abdominal aortic aneurysm rupture will lead to peritoneal tear. 3. Hernia: refers to the organs or tissues in the body leave the normal anatomical parts, through the congenital or acquired formation of weak points, defects or holes, into the neighboring parts, mostly occurring in the abdomen, to the extra-abdominal hernia is common, the serious cases will lead to peritoneal tear. Peritoneal tear may also have other causes, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.