Pancreatitis fasting water appeared diarrhea, may be caused by the disease itself, may also be intestinal flora dysbiosis, acute gastroenteritis, etc., need to take general measures for the cause of the conditioning, if necessary, drug treatment. 1. The disease itself: pancreatitis patients with diarrhea symptoms after fasting and water fasting, the need for timely parenteral nutrition, for example, through intravenous infusion of fat milk, compound amino acid injection, water electrolyte solution and other nutrients. 2. Intestinal dysbiosis: If pancreatitis patients have intestinal dysbiosis after fasting and water fasting, it will also be manifested as diarrhea, at this time, the patients can use bifidobacteria, lactobacilli and other micro-ecological agents under the guidance of the doctor, as well as montelukast and other antidiarrheal drugs. 3. Acute gastroenteritis: for acute gastroenteritis caused by pancreatitis fasting water appeared diarrhea, you can follow the doctor’s instructions with Saccharomyces boulardii, Lactobacillus rhamnosus and other probiotics, as well as montelukast and other antidiarrheal drugs. Antibiotics that primarily target negative bacilli, such as norfloxacin, are also needed. Patients with pancreatitis who develop diarrhea after fasting and water intake need to inform the responsible physician, who will treat the cause.