Thin feces with black particles may be associated with ruptured bleeding fundic veins and peptic ulcers, which are treated primarily with medications and surgery. Bleeding from ruptured varices in the fundus of the stomach is often caused by cirrhosis of the liver, which causes symptoms of gastrointestinal bleeding and manifests as black stools. Common therapeutic drugs include growth inhibitor, octreotide, terlipressin and pituitary pressor, etc., which are mainly used to reduce portal vein blood flow and lower portal vein pressure. Surgical modalities include transjugular intrahepatic shunt and triple-lumen, two-bladder tube compression hemostasis. Typical symptoms of peptic ulcer are abdominal pain, vomiting blood and black stool. Common therapeutic drugs include aluminum thioglycollate and raiomeprazole, which are mainly used to neutralize gastric acid therapy and inhibit gastric acid secretion. Surgical methods include major gastrectomy and vagotomy, which are suitable for patients with gastrointestinal perforation and those who are not treated with medication. If you find thin feces with black particles, you should consult a doctor in time and take treatment under the doctor’s guidance, do not take medication without authorization, so as not to delay the condition. Pay attention to rest on weekdays and take a reasonable diet.