The pancreas is a retroperitoneal organ, located behind the peritoneum in the posterior wall of the stomach, and the head of the pancreas is surrounded by the duodenum. Patients with pancreatitis may present with pain in the upper abdomen, which may radiate to the left side of the back of the shoulder or the left side of the lower back, and pancreatitis may also easily present with peripancreatic exudate or even necrosis; it may also present with petechiae in the lower back or around the umbilicus, and the patient may also easily present with fever, nausea and vomiting. The patient may also present with fever, nausea and vomiting. The blood and urine amylase is elevated and there are obvious pressure points in the upper abdomen on examination. In acute edematous pancreatitis, the pressure pain is mainly around the umbilicus without rebound pain and muscle tension. If the pancreatitis is complicated by hemorrhage and necrosis, there is a tendency to develop fluid in the abdominal cavity, or even abdominal infection and abscess formation, which may manifest as pain throughout the abdomen and signs of peritoneal irritation.