Acute pancreatitis is still mild pain after discharge from the hospital. There are many reasons for the pain, such as inflammation still present, gastrointestinal pain, pancreatic pseudocyst, and untreated primary disease. 1. Inflammation: the inflammation may not be fully controlled, resulting in mild pain, anti-inflammatory treatment should be continued. 2. Gastrointestinal pain: In case of exclusion of inflammation in the pancreas, it may be due to poor recovery of gastrointestinal function, which requires adjustment of dietary structure, and if the pain is severe, it should be promptly consulted. 3. Pancreatic pseudocysts: the most common complication of pancreatitis is pseudocysts, if the pseudocysts are too large, they can compress the surrounding tissues and cause mild pain. 4. Untreated primary disease: The most common cause of acute pancreatitis is biliary diseases, such as gallstones. If the gallstones are not treated or recur, they will cause pancreatitis to occur again and cause pain. It is recommended to consult a doctor for further examination to clarify the cause of the pain and treat it under the guidance of a specialist.