Tummy pain after eating a good meal is considered to be caused by these disease factors such as indigestion, chronic gastritis, gastric ulcer, duodenal ulcer, cholecystitis, etc.: 1. Patients who usually have indigestion, due to insufficient gastric power and slow gastrointestinal peristalsis, when after eating a meal, the food is difficult to digest in the stomach, resulting in delayed gastric emptying, undigested food in the stomach stimulates the stomach wall, resulting in spasms and pain in the stomach. 2, patients with chronic gastritis usually exist, due to inflammatory stimulation of the mucosa of the stomach leading to congestion and reduced digestive capacity. When eating a meal, there will also be food undigested to stimulate the stomach wall, resulting in spasm pain. 3, patients with gastric ulcer and duodenal ulcer, due to damage to the gastric mucosa and duodenal mucosa, the secretion of gastric acid is usually too much, when eating a meal will stimulate the secretion of more gastric acid, further stimulating the ulcer surface, resulting in pain. 4, patients with cholecystitis usually due to the existence of inflammation in the gallbladder wall, after eating will stimulate The liver secretes bile, and the gallbladder cavity blood circulation is obstructed with inflammation, unable to discharge bile to help digestion, will appear stomach distension pain.