Early symptoms of chronic pancreatitis are usually pain in the upper abdomen. When the flow of pancreatic fluid is blocked, it causes an attack of acute pancreatitis, which, if left untreated, leads to chronic pancreatitis. At first, the symptoms of chronic pancreatitis manifest as intermittent epigastric pain, which develops into persistent epigastric pain after a certain period of time, mainly due to the narrowing of the pancreatic duct. Abdominal pain can be triggered by diet, overeating, etc. Chronic pancreatitis will develop pancreatic exocrine dysfunction in the later stages, which can cause symptoms such as loss of appetite, emaciation, edema, and malnutrition. Chronic pancreatitis also destroys pancreatic β-cells, leading to abnormal glucose tolerance and clinical symptoms of diabetes. When symptoms such as epigastric fullness, abdominal pain and loss of appetite occur repeatedly after eating, you should go to the hospital in time and ask the doctor to clarify the cause of the disease and treat the symptoms.