A vague pain in the stomach is not a sign of a specific disease, but can be caused by a variety of diseases such as indigestion, gastric ulcers, pancreatitis, and heart disease. 1. Indigestion: When indigestion occurs, food stays in the stomach for a longer period of time, causing a feeling of fullness and bloating after a meal, and when food moves too slowly in the intestines, acid reflux and vomiting will occur in the stomach, causing a vague pain in the stomach. You should pay attention to regular diet and eat in moderation. 2. Gastric ulcers: The common causes of gastric ulcers are traumatic stress, Helicobacter pylori infection, etc. In patients with gastric ulcers, the protective layer of the gastric mucosa is weak, and the excessive secretion of gastric acid after eating will stimulate the gastric mucosa at the ulcer and cause stomach pain, which is usually more severe. 3. Pancreatitis: clinically, the main manifestation of pain in the upper abdomen, gastrointestinal tract peristalsis abnormalities, causing vague pain in the stomach, can be accompanied by a series of symptoms, such as fever, malaise, nausea, vomiting, abdominal distension, anorexia, and other symptoms, the symptoms are aggravated by eating. 4. Malignant tumors of the stomach: When malignant tumors of the stomach grow gradually and invade the stomach, they cause symptoms of vague pain in the stomach. There are many diseases that cause vague pain in the stomach, 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 determine the cause of the disease and targeted treatment, do not take medication, so as not to delay the condition.