Severe pancreatitis, due to different stages of pathological changes, presents diverse systemic responses. Generally, mild symptoms of pancreatitis include abdominal pain, nausea, vomiting, and fever. In severe pancreatitis, apart from these symptoms, due to bleeding, necrosis, and autolysis of the pancreas, additional symptoms such as shock, high fever, jaundice, abdominal distension, and paralytic ileus, peritoneal irritation signs, and subcutaneous ecchymosis may also occur. Abdominal pain is the earliest symptom, while nausea and vomiting are manifestations due to inflammatory factors stimulating the vagus nerve. The likelihood of jaundice is relatively low in acute edematous pancreatitis but is more common in severe pancreatitis. Extensive inflammatory exudation in the pancreas can lead to pancreatic necrosis and localized abscesses, which may cause varying degrees of fever increase.