Back pain associated with stomach pain should be considered as gastroduodenal disease, and may also be due to gastroesophageal reflux disease, or acute myocardial infarction. 1. Gastroduodenal diseases: such as ulcers in the posterior wall of the stomach or the duodenal bulb, because the duodenal suspensory ligament fixes the duodenum to the posterior wall of the stomach, so there will be associated back pain. If bile refluxes into the stomach, epigastric pain and radiating back pain may occur. Treatment may include drugs such as bismuth potassium citrate and omeprazole. 2. Gastroesophageal Reflux Disease (GERD): excessive secretion of gastric acid stimulates the mucous membrane of the digestive tract and leads to radiation to the back and shoulder blades. Treatment should choose acid-suppressing drugs such as ranitidine and domperidone to promote gastric power. 3. Acute myocardial infarction: myocardial cells due to ischemia and hypoxia caused by narrowing of blood vessels, resulting in myocardial ischemia and necrosis, there will be pain behind the sternum, which can be reflected to the back. Treatment should be thrombolytic therapy or arterial intervention. If the above symptoms occur, the specific cause should be identified and treated according to the etiology.