Acute pancreatitis is an acute inflammation caused by pancreatic enzymes digesting the pancreas and its surrounding tissues, mainly manifesting as inflammatory edema, hemorrhage and necrosis of the pancreas, so also known as acutehemorrhagicnecrosisofpancreas, which occurs in middle-aged men, with a history of overeating or biliary tract disease before the attack. The clinical manifestations are sudden onset of severe pain in the upper abdomen and may appear as shock. Causes: 1. Biliary system diseases. Bile duct inflammation, stones, parasites, edema, spasm and other lesions cause obstruction in the jugular abdomen, coupled with gallbladder contraction, increased pressure in the bile duct, bile flowing back into the pancreatic duct through the common channel, activating pancreatic zymogen, thus causing pancreatitis. 2, alcoholism and overeating. Alcoholism and overeating make the pancreatic juice secretion strong, and poor pancreatic duct drainage, resulting in increased pressure of pancreatic juice in the pancreaticobiliary system, resulting in high concentration of protease excretion disorder, and finally leading to the rupture of pancreatic vesicles and the onset of disease. 3, surgery and injury. Gastric, biliary tract and other abdominal surgery squeezed to the pancreas, or cause excessive pressure in the pancreatic bile duct, can also cause pancreatitis.