Causes of left back pain stomach congestion are gastric ulcer, cholecystitis, myocardial infarction and so on. 1. Gastric ulcer: If the ulcer is located in the greater curvature of the stomach, when the surface of the broken mucosa is stimulated by gastric acid and food, it will stimulate the nerve endings distributed on the surface of the broken mucosa to cause pain, and since the location of the greater curvature of the stomach is adjacent to the mucosa of the left side of the back, the pain will involve the area, and the symptoms mentioned above will occur. 2. Cholecystitis: when the gallbladder inflammation will lead to bile secretion obstacles, affecting food digestion, food can not be quickly digested, decomposition, the patient will feel clogged in the stomach. And the inflammatory degeneration of the gallbladder will produce pain, the pain is radioactive, will involve the back pain, manifested in the above symptoms. 3. Myocardial infarction: in the physiological anatomy, the heart lower boundary of the neighboring tissues have stomach, when the myocardium due to ischemia and hypoxia lead to myocardial cells and myocardial damage to produce pain, the pain will be radiated to the stomach, affecting the gastric function of the stomach blockage of panic symptoms. When the patient has left back pain stomach congestion, must go to the hospital for examination to clarify the cause of the disease, such as palpation, electrocardiogram, abdominal ultrasound.