The main symptom of gastric ulcer is pain in the upper abdomen, which usually occurs with a certain rhythm, and the pain in the upper abdomen is more obvious mainly after meals, while the pain can be alleviated during fasting, and rarely occurs at night. Gastric ulcers seldom cause changes in bowel movements, but only when gastric ulcers are combined with bleeding may cause changes in the shape or character of the stool. When gastric ulcer is combined with bleeding, the stool is black and tarry, at this time, we need to consider whether the gastric ulcer has a certain complication, and this complication is bleeding, routine blood test can observe whether there is anemia or not, and fecal occult blood test can observe whether there is bleeding or not. In addition to this situation, the stool characteristics in general in the occurrence of gastric ulcer will rarely appear to change.