If you have a vague pain in your stomach after eating, consider that it may be related to gastric ulcer, irregular diet, gastritis and other reasons. 1. Gastric ulcer: The typical symptom of gastric ulcer is a vague pain in the stomach after eating. The occurrence of this disease may be related to Helicobacter pylori infection, taking non-steroidal anti-inflammatory drugs such as aspirin, ibuprofen and other factors. 2. Irregular diet: usually three meals do not eat on time, often overeating, like alcohol, may affect the normal digestion and absorption function of the gastrointestinal tract, resulting in a hidden pain in the stomach after eating. 3. Gastritis: Eating too much at once leads to indigestion or eating too greasy, spicy and stimulating food, stimulating the gastric mucosa causing damage to the gastric mucosa leading to stomach pain. The stomach pain may be related to other gastrointestinal diseases, we suggest to go to the gastroenterology department of the hospital, with the doctor to improve the gastroscopy, liver, gallbladder, pancreas and spleen ultrasound and other related examinations, in order to clarify the cause of the disease.