Left abdominal pain can occur in pancreatitis, but the diagnosis cannot be made directly on the basis of the symptoms alone and requires comprehensive judgment. Acute pancreatitis has a rapid onset and is mainly associated with triggering factors such as overeating, excessive consumption of high-fat foods, alcohol consumption, biliary ascariasis and mental agitation. The pain is mostly in the upper and middle abdomen, but it can also manifest as left upper abdominal pain, which is obvious in supine position and can be relieved by sitting and leaning forward. The pain is mostly persistent and may radiate to the left lower back. Confirmation of the diagnosis requires serum and urine amylase and lipase tests at the hospital, and also combined with imaging tests to find pancreatic inflammatory manifestations, etc. The diagnosis can be confirmed.