Stomach pain after eating may be caused by dietary factors, functional dyspepsia, chronic gastritis, gastric ulcer and other reasons. 1. Dietary factors: eating a lot of spicy and stimulating food during meals causes irritation to the gastric mucosa, resulting in stomach pain after eating. 2. Functional dyspepsia: stomach peristalsis is relatively slow, the secretion of digestive juices is reduced, and you can’t empty the food in time after eating, which increases the pressure of the stomach, and you may experience stomach pain, bloating, nausea and other discomforts. 3. Chronic gastritis: due to chronic inflammation, gastric mucosal damage, erosion affects the digestion of food, may appear after eating stomach pain, acid reflux, nausea, early satiety and other symptoms. 4. Gastric ulcer: the typical symptom of this disease is postprandial pain, which can be accompanied by acid reflux, heartburn, nausea and other symptoms. Excluding physiological factors, if the symptoms continue to be unrelieved, it is recommended to consult a doctor in a timely manner, under the guidance of a doctor to clarify the cause of the disease and targeted treatment, do not take medication on their own, so as not to delay the condition.