Pain on the left side of the stomach can be seen in the following conditions: first, poor digestion, most of which will be characterized by pain in the quarter rib area, as pain in the left upper abdomen, which is usually mostly related to one’s eating habits as well as exertion, excessive stress and emotions. Second, the left upper abdominal pain may be caused by gastric and duodenal lesions, such as chronic gastritis, gastric ulcer, duodenal ulcer, in Western medicine, most cases of stomach are pain under the saber, for the left abdominal pain, gastrointestinal dysfunction may appear left upper abdominal pain, because most of the abdominal pain localization is not accurate, appear left upper abdominal pain. In this case, it is necessary to improve the examination of the ultrasound of the upper abdomen or gastroscopy and other examinations to further assist in the diagnosis.