Chest pain after eating and no pain is mainly related to reflux esophagitis, gastritis, duodenal ulcer and other reasons. 1. Reflux esophagitis: due to the prolonged emptying of gastric contents and duodenal fluid reflux into the esophagus, resulting in excessive contact with the esophageal mucosa of the human body or exposure to gastric juices, resulting in esophageal mucosal damage, erosion and breakage, thus causing pain in the chest, after eating the stomach acid and food mixing and digestion, the esophageal mucosa contact with gastric acid is reduced, and the pain will gradually disappear. 2. Gastritis: due to bacterial infection, drugs, alcoholism and other reasons, caused by increased gastric acid or reduced protective mucus, gastric acid directly contact with the stomach wall and damage, there is pain, part of the stomach exists in the chest area, resulting in chest pain, after eating, gastric acid mixes with food to reduce the stimulation of the stomach wall, the pain is relieved. 3. duodenal ulcer: duodenal ulcer is mostly related to gastric acid secretion, manifested as hunger pains, night pains, relieved after eating, due to inaccurate localization of visceral pain caused by the duodenum, which can be manifested as chest pain. Chest pain after eating and no pain is mainly caused by excessive gastric acid secretion, if a long time can not be relieved, it is recommended to go to the hospital in time to clarify the causes of excessive gastric acid secretion.