People with a bad stomach don’t necessarily have bad intestines. Bad stomach, if it is gastritis, gastric ulcer, gastric polyps and other local lesions of the stomach, such as gastric mucosa local congestion, edema, breakage, the emergence of abnormal tissue, etc., only affects the normal function of the stomach, the appearance of nausea, vomiting, gastric pain, gastric distension, postprandial satiety and early satiety, and other gastric symptoms, and will not affect the function of the intestinal tract. Bad stomach, if it is caused by Helicobacter pylori infection, taking aspirin and other non-steroidal anti-inflammatory drugs, stress, surgery, trauma and other factors, will not only cause nausea, pain and other symptoms of the stomach, but also cause duodenal ulcers, perforation, bleeding and other diseases, diarrhea, nausea, abdominal pain, constipation, gastrointestinal bleeding, blood in stool and other symptoms. Patients with a bad stomach are advised to seek timely medical attention for a clear diagnosis and targeted treatment under the guidance of a doctor.