The causes of left upper abdominal pain with corresponding back pain in the middle of the night may be coronary heart disease and digestive system diseases. 1. Angina pectoris, acute myocardial infarction: if there is a history of coronary heart disease, or hypertension, diabetes and other medical history, left upper abdominal pain in the middle of the night accompanied by corresponding back pain may be due to myocardial ischemia, hypoxia, resulting in angina pectoris attack or even myocardial infarction. Some patients with angina may present with gastrointestinal discomfort radiating to the back pain. Can be sublingual fast-acting heart pills, nitroglycerin, etc., if the symptoms continue to be unable to relieve, be alert to acute myocardial infarction. Should stay in bed, and call 120 home emergency as soon as possible. 2. Digestive system diseases: such as gastroduodenal ulcer, reflux esophagitis, cholecystitis, acute pancreatitis, etc. may be due to improper diet during the day, fatigue and other factors that lead to the onset of the night, the emergence of the left upper abdominal pain accompanied by the corresponding back pain symptoms, but also nausea, vomiting, etc., such as the pain is severe, and can not be relieved, it is recommended that the emergency room to seek medical attention. The above are only some of the common causes. Upper left abdominal pain with back pain in the middle of the night needs to be taken seriously, even though it is the middle of the night, if the symptoms are serious, it is necessary to consult a doctor in time to avoid delaying the condition.