Duodenal bulbous ulcer A1 stage, black stool can be treated through general treatment, drug treatment, endoscopic treatment, surgical treatment and other ways. 1. General treatment: patients should ensure normal work and rest, avoid staying up late, and change dietary habits, avoid overeating and intake of stimulating food, severe cases need to fast, in addition, patients should also strictly quit smoking and alcohol, so as not to aggravate the condition. 2. Drug therapy: patients can follow the doctor’s instructions to use drugs to inhibit gastric acid secretion, such as lansoprazole, pantoprazole, ranitidine, etc., and the joint use of drugs to protect the gastric mucosa, such as colloidal bismuth pectin, magnesium aluminum carbonate and so on. The vast majority of patients with duodenal bulb ulcers will have Helicobacter pylori infection, therefore, patients should take quadruple therapy containing bismuth as prescribed by the doctor, which includes a proton pump inhibitor (such as omeprazole, rabeprazole, etc.), two kinds of antibiotics (such as amoxicillin+clarithromycin, amoxicillin+metronidazole, etc.), and a kind of bismuth (such as colloidal bismuth in pectin, etc.). 3. Endoscopic treatment: black stool indicates that the duodenal bulb has an ulcer bleeding phenomenon, the patient can be evaluated by the doctor, choose titanium clips and other mechanical hemostasis, local spray medication to stop bleeding, to reduce symptoms. 4. Surgical treatment: If the bleeding is large and the non-surgical treatment is ineffective, surgical treatment such as interventional surgery can be performed. It is recommended that the patient go to the hospital in time, after the doctor’s evaluation, choose the appropriate treatment plan, and the medication should be used under the doctor’s guidance.