Sore stomach may be the presence of gastritis, peptic ulcer and other diseases. 1. Gastritis: due to diet, drugs, alcohol, infection and other factors to stimulate the gastric mucosa, triggering acute or chronic inflammation of the gastric mucosa, symptoms manifested as gastric acidity, loss of appetite, nausea, vomiting, abdominal distension, etc., generally need to carry out a gastroscopy, gastric mucosal pathology examination to confirm the diagnosis. 2. Peptic ulcer: excessive secretion of gastric acid, Helicobacter pylori infection and other reasons lead to inflammatory necrosis of the digestive tract mucosa, the formation of ulcers deep or penetrate the mucosal muscle layer, the most common gastric and duodenal, gastric ulcers typical symptoms generally appear after meals, duodenal ulcers are generally found in the fasting, gastric pain before meals, most can be diagnosed through the gastroscope or barium meal and other tests. There may be other reasons for stomach pain, so you can go to the hospital for examination to clarify the situation.