For gastrointestinal bleeding, the degree of bleeding can be judged according to clinical symptoms. For acute blood loss, if the amount of bleeding is greater than 800 ml in a short period of time, the patient will have obvious wet and cold body, thirst, increased heart rate, decreased blood pressure and other manifestations of hemorrhagic shock, which is usually seen in the esophagogastric fundal variceal hemorrhage, peptic ulcer resulting in acute blood loss. For patients with chronic blood loss, it will be manifested as black stools, usually tar-like stools, and it will also be found that the routine blood red blood cell count, hemoglobin quantitative changes in the progressive decline, the investigation will find that there is a clear appearance of anemia, the emergence of peripheral mucous membranes, skin tissue edema, gastroscopy, enteroscopy can also be further diagnosed clearly.