Pain when pressing on the stomach may be caused by gastritis, gastric ulcer or stomach tumor, etc. If you have symptoms of pain when pressing on the stomach, please consult a doctor in time. 1. Gastritis: Acute gastritis caused by viral or bacterial infection, chronic gastritis induced by poor dietary habits, Helicobacter pylori infection and other factors, or damage to the gastric mucous membrane due to prolonged use of aspirin and other drugs may lead to pain when pressing on the stomach. 2. Gastric ulcer: patients with gastric ulcer may experience pain when pressing on the stomach, especially after eating. It may also be accompanied by bloating and black stools. 3. Stomach tumor: when there is a tumor in the stomach or duodenum, the tumor will cause direct invasion damage to the gastrointestinal tract, destroying the tissues of the gastrointestinal tract and causing pain in the stomach. Painful manifestations can occur when pressing. Pancreatitis and other diseases can also be caused by the symptom of pain when pressing the stomach. When there is pain when pressing the stomach, you must go to the hospital in time to find out the cause of the pain and treat it in time.