Having normal stools all the time does not mean that there is no major problem with your stomach. Stomach disease can affect the stool. Stomach disease can lead to changes in bowel habits and time of bowel movement, as well as the shape and color of the stool. For example, gastric ulcer bleeding, gastroesophageal variceal rupture bleeding, gastric cancer bleeding can lead to black stools; gastric digestive dysfunction, chronic gastritis, gastric ulcer, gastric cancer, etc. can be unshaped stools, constipation, diarrhea performance. However, normal stool does not mean that there is no big problem in the stomach, such as superficial gastritis with slight gastric mucous membrane damage, often there is no abnormality in the stool; small polyps in the stomach, gastroesophageal reflux and other diseases may be manifested as normal stool. If you have any discomfort or abnormal stools, you should go to the hospital for treatment under the guidance of a doctor.