Gastric distension and back pain may be caused by gastritis, peptic ulcer, cholecystitis, pancreatitis and other reasons. 1. Gastritis: chronic inflammation of the gastric mucosa causes congestion, edema, erosion, etc., usually manifests abdominal distension, acid reflux, nausea, vomiting, and in severe cases, back pain is also involved. 2. Peptic ulcers: such as gastric ulcers, duodenal ulcers, gastrointestinal mucosa digested by gastric acid and pepsin and ulcers, manifested as gastric distension, gastric pain, which may be accompanied by acid reflux, heartburn and other symptoms. Gastric or duodenal back wall ulcers, especially penetrating ulcers can radiate to the back. 3. Cholecystitis: Acute attack of cholecystitis is mainly epigastric pain. At the beginning, there is only epigastric distension and discomfort, which gradually develops into paroxysmal colic; night attacks are common, and attacks are often triggered by full meals and eating fatty foods. The pain radiates to the right shoulder, scapula and back. Accompanied by nausea, vomiting, anorexia, constipation and other gastrointestinal symptoms. 4. Pancreatitis: Acute abdominal pain in pancreatitis radiates to the back, accompanied by stomach distension, nausea, vomiting and other symptoms. Stomach distension and back pain involve many causes, if the symptoms continue to be unrelieved, it is recommended to consult a doctor in a timely manner, under the guidance of a doctor to determine the cause of the disease and targeted treatment, do not take medication on their own, so as to avoid delays in the condition.