The causes of epigastric pain after discharge from the hospital for biliary pancreatitis are: recurrence of pancreatitis, pancreatic pseudocysts, gastroduodenal ulcers. Specific analysis is as follows: 1. recurrence of pancreatitis: failure to actively deal with bile duct stones, stone residue, bile duct infection and other reasons can lead to increased bile duct pressure, pancreatic fluid can not be discharged through the pancreatic duct, affecting the recovery of pancreatitis, and epigastric distension and pain in the clinical manifestations. 2. Pancreatic pseudocysts: Pancreatic pseudocysts are usually formed a few weeks after pancreatitis and mainly contain pancreatic amylase and other digestive enzymes. If the cyst is small, there is no clinical symptom, but if the cyst is large, it will cause abdominal distension, abdominal pain and other symptoms when it presses the local tissues and organs. 3. gastroduodenal ulcer: abdominal distension should be differentiated from gastroduodenal ulcer, cholestatic pancreatitis may cause the body to produce a stress response, gastroduodenal mucosal barrier function damage, gastric acid damage to the mucosal ulcers, the clinical manifestation of abdominal distension. It is recommended that patients go to regular hospitals to regularly review the abdominal CT, abdominal ultrasound and blood amylase and other related examinations, to clarify the recovery of the condition in a timely manner, if the condition is found to be progressing, according to the doctor’s treatment plan to actively treat, to avoid delaying the condition.