Stomach bloating pain after meals is caused by gastric ulcer, indigestion, and pyloric obstruction. Many patients with gastric ulcer will have pain after meals, mainly in about 1-2 hours after meals, the pain is mainly distension, dull pain, gastric ulcer is the reason why the stomach bloating pain after meals, is due to food to the gastric glands caused by stimulation resulting in excessive secretion of gastric acid, affecting the peristaltic function of the stomach. When the human body has indigestion, the food in the stomach will be retained in the stomach because it cannot be emptied in time, and some of the food in the stomach will ferment badly after neutralizing with digestive juices, which will not only produce a lot of gas, but also cause irritation to the stomach wall, resulting in a feeling of stomach distension and pain. When ulcers frequently appear in the pylorus, they can lead to pyloric scarring and even pyloric obstruction. When pyloric obstruction occurs, the food in the stomach is not emptied through the pylorus in time after digestion and stays in the stomach, which will also cause stomach distension and pain, and many people will also be accompanied by nausea and vomiting.