Patients with acute pancreatitis may experience different symptoms based on the cause of the pancreatitis and the staging of the patient's condition. A fever in acute pancreatitis indicates a severe infection. If a CT scan shows extensive pancreatic effusion, coupled with hyperglycemia and hypocalcemia, it suggests that the condition is severe and there is a tendency towards severe pancreatitis. This type of fever generally requires treatment, sometimes even surgical intervention, and usually takes about half a month to a month to subside. If the fever is caused solely by biliary pancreatitis due to bile duct obstruction by gallstones, and surgical intervention to remove the obstruction is performed, the fever will typically diminish significantly in the short term.