Elderly people may have indigestion, pyloric obstruction, gastroesophageal reflux disease (GERD) and other causes. 1. Dyspepsia: When the elderly suffer from dyspepsia, due to the weakening of peristaltic function of the stomach and the decrease in the secretion of digestive enzymes and other substances, food cannot be digested and emptied in time, and the accumulation of food inside the stomach can lead to an increase in the pressure inside the stomach, which can then cause the symptom of “going up and down” when you eat something. 2. Pyloric obstruction: When obstruction occurs in the elderly, due to the damage of the pyloric duct, the pyloric duct is narrowed, resulting in food not being able to be discharged from the stomach into the intestines in a timely manner, resulting in a large amount of food being accumulated in the stomach, which can cause acute dilatation of the stomach volume, thus leading to the manifestation of the upward reflux when eating. 3. Gastroesophageal Reflux Disease (GERD): GERD is usually caused by sphincter dysfunction, resulting in the junction between the esophagus and the stomach not being able to be closed completely, which can lead to the symptom of vomiting when you eat. If the symptoms of GERD are not relieved, it is recommended to go to a regular hospital for examination and treatment.