Stomach pain and generalized weakness is usually caused by gastric ulcer, chronic gastritis, pancreatic cancer and other reasons, if you have symptoms should go to the hospital in time for medical treatment. 1. Gastric ulcer: Gastric ulcer is usually caused by Helicobacter pylori infection, taking aspirin and other drugs, stress and other factors, the patient’s stomach will appear pain, mostly occurring in half an hour to one hour after meals, there will be vomiting, vomiting blood, stomach bloating, belching and other symptoms, so there can be a stomach ache and general weakness. 2. Chronic gastritis: chronic gastritis is generally associated with fast or irregular eating, overeating, long-term smoking and other factors, patients will experience dull pain in the epigastric region, burning pain, fullness and bloating and other symptoms, patients will also experience general weakness, anemia, weight loss, anorexia and other symptoms. 3. Pancreatic cancer: Pancreatic cancer is mostly caused by genetic abnormality, obesity, bad dietary habits, etc. Abdominal discomfort or abdominal pain is usually the first symptom of the disease, and abdominal pain caused by pancreatic tumor stimulating retroperitoneal nerves can be regarded as stomach pain. Patients may be accompanied by weight loss, fatigue, jaundice, dyspepsia, low-grade fever and other symptoms. There are many reasons for the general weakness of stomach pain, and the specific causes need to go to the hospital for examination to determine, and after diagnosis, treatment should be carried out under the guidance of the doctor.