There are many reasons for left-sided abdominal pain with bloating and black stool, such as caused by gastritis and gastric ulcer, which can be treated by oral medication (e.g., omeprazole, etc.); and pancreatitis, which can be relieved by fasting, rehydration, inhibition of exocrine pancreatic secretion, and anti-infective treatments. 1. Gastritis, gastric ulcer: mostly manifested as abdominal pain after eating, gastric distension, nausea and vomiting, which can be relieved after vomiting, acid reflux, heartburn, hiccups, and occasionally black stool. It can be treated with oral medication, such as omeprazole and magnesium aluminum carbonate. 2. Pancreatitis: most of them have a history of binge drinking or alcoholism, manifested as epigastric and left upper abdominal pain, which may be accompanied by dyspepsia, nausea, black stool and other symptoms. It is recommended to give fasting, rehydration, inhibition of pancreatic exocrine and pancreatic enzymes and anti-infection. There are many other causes of left-sided abdominal pain with gastric distension and black stool. If the above situation should go to the hospital in time, under the guidance of the doctor to identify the causes, and then actively treat, so as not to delay the condition.