Usually, stomach pain is located in the upper abdomen. This is mainly due to the fact that most of the stomach is located in the left quartal region when it is full, and only a small portion is located in the supra-abdominal region. Food enters the stomach through the esophagus through the cardia, and the stomach is relatively small in the fasting state, and gradually increases in size in the feeding state to accommodate the various foods that enter the stomach. Under the mechanical action of the stomach, the volume of food becomes smaller, and under the action of pepsin and other digestive enzymes, the food is initially digested. The gastric acid in the gastric juice has a bactericidal effect and kills some of the bacteria that enter the stomach. There are many causes of stomach pain, including excessive tension at work, irregular diet, drinking too much alcohol, etc., which can make the liquid that originally stayed in the stomach reflux into the esophagus or increase the local secretion of gastric acid, which stimulates the gastric mucous membrane, and thus stomach pain occurs. In addition, it is recommended that patients with stomach pain go to the hospital in time and follow the doctor’s instructions for treatment to avoid delaying their condition.