Periumbilical discoloration is one of the signs of acute hemorrhagic necrotizing pancreatitis. Acute hemorrhagic necrotizing pancreatitis is a type of acute pancreatitis, which is caused by the continued development of acute edematous pancreatitis lesions. There is extensive necrosis of pancreatic alveoli, fat and blood vessels, edema of pancreatic tissue, increase in size, and extensive hemorrhagic necrosis. The retroperitoneal space is heavily hemorrhagic with exudate. The omentum and tissues of the lining are digested by the exuded pancreatic enzymes. This type of pancreatitis is severe and develops rapidly, with many complications and a high mortality rate. How to diagnose peribulbar discoloration? 1. Symptoms Sudden onset of severe epigastric pain or high fever during the treatment of acute edematous pancreatitis, diffuse peritonitis, paralytic intestinal obstruction, epigastric mass, gastrointestinal bleeding, neuropsychiatric symptoms, shock. 2. Signs: full abdominal distension, pressure pain and rebound pain, mobile turbid sounds, loss of bowel sounds, subcutaneous fat necrosis due to leakage of bloody exudate containing pancreatic enzymes through the retroperitoneal space to the subcutis in a few patients, bruising of the abdominal wall on both sides and discoloration around the umbilicus. 3, auxiliary tests ① Blood and urine amylase may have persistent elevation or not due to extensive pancreatic necrosis. Blood calcium decreases, and its value <1.74mmol/L (7mg%) is poor prognosis. Blood glucose is elevated and glycosuria develops. Positive serum methemoglobin. (ii) Bloody turbidity of abdominal puncture fluid, elevated amylase and lipase. ③B-type ultrasonography shows enlarged pancreas with sparse internal light dot reflection. CT shows diffusely enlarged pancreas with irregular shape, blurred margins and widened peripancreatic gap. Acute pancreatitis five generally disappears after about 3 to 7 days of non-surgical treatment, and the symptoms gradually heal. Hemorrhagic and necrotizing pancreatitis are serious and long-lasting, and can lead to death due to shock, as well as the formation of limited abscesses and posthumous pseudocysts.