A stomach ache after eating may be caused by indigestion, peptic ulcer, pancreatitis, etc. If the symptoms continue to be unrelieved, it is recommended to consult a doctor in a timely manner to find out the cause of the disease and follow the doctor’s instructions for treatment. 1. indigestion: if you eat too fast or eat irregularly, which increases the burden on the stomach, the food can not be fully digested and absorbed, resulting in increased pressure on the lining of the stomach, resulting in stomach pain, accompanied by symptoms of flatulence. 2. Peptic ulcer: The secretion of gastric acid increases after eating, which causes gastric pain by stimulating the gastric mucosa and is accompanied by the symptoms of postprandial bloating and acid reflux. Gastric ulcer is the most typical symptom of pain after eating. 3. Pancreatitis: Due to eating more high-fat food or drinking alcohol frequently, pancreatic fluid drainage is not smooth, resulting in inflammation of pancreas, and there will be stomach pain, nausea, vomiting and other symptoms when pancreatitis strikes. Stomach pain after eating may also be related to esophagitis, gastritis, etc. It is recommended that patients go to the hospital in time for examination and treatment according to the specific situation.