Stomach pain after eating is mainly considered gastroenteritis, gastritis, pancreatitis and other conditions. 1. Gastroenteritis: mostly related to unclean diet, poorly digested diet, too cold, too spicy and other stimulating diets, at this time the patient’s intestinal wall edema, a large number of inflammatory cells in the intestinal wall gathered, there will be a stomach ache after eating, accompanied by nausea, vomiting, diarrhea and other discomforts. 2. Gastritis: patients because of the damage to the mucous membrane of the stomach wall, resulting in gastric acid directly stimulate the gastric mucous membrane, when the gastric acid secretion after eating too much, accelerating the stimulation of the gastric mucous membrane, resulting in stomach pain after eating. 3. Pancreatitis: when the pancreatic cells are destroyed, a large number of pancreatic enzymes are released from the body, and the release of pancreatic enzymes is facilitated after eating, stimulating the peritoneum and its surrounding organs, causing stomach pain after eating. In addition, stomach pain after eating, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.