The causes of stomach pain caused by eating too much may be due to irregular diet, spleen and stomach weakness, stomach disease, etc. 1. Irregular diet: due to the patient’s long-term diet irregularity, once eating too much, it will cause damage to the gastric mucosa, leading to insufficient gastric power and symptoms of stomach pain. 2. Weakness of the spleen and stomach: especially for the elderly or underage children, the digestive function is not perfect, and the food can not be digested and absorbed properly, which leads to the accumulation of food in the gastrointestinal tract and the symptom of stomach pain after eating too much. 3. Gastric diseases: such as chronic gastritis, gastroesophageal reflux disease, gastric tumors, gastric ulcer and other gastrointestinal dysfunction patients, once eating too much, will stimulate the gastric mucosa, aggravate the secretion of gastric acid caused by the symptom of stomach pain. When the patient appears to eat too much on the stomach pain, it is recommended to go to the hospital in a timely manner, clear the cause of the disease and actively cooperate with the doctor’s treatment.