The symptoms of rebleeding from gastrointestinal bleeding are determined by the amount of bleeding and the rate of bleeding of the patient. Usually, if the patient’s bleeding volume is relatively small and the bleeding rate is slow, the patient will simply present with black stool, usually when the bleeding volume is 50-100 ml. If the patient is bleeding faster and the bleeding volume is more, it will manifest as blood in the stool. If the patient bleeds more than 1000ml, the patient will have blood in the stool. In upper gastrointestinal bleeding, the patient presents with black stool syndrome. Patients with lower gastrointestinal bleeding usually present with blood in the stool, which requires special clinical attention. In addition, the patient may also have systemic symptoms, such as dizziness, weakness, anemia, weight loss, and even nausea, vomiting, and vomiting of blood in some patients. Clinically, if a patient has rebleeding in the gastrointestinal tract, it needs to be taken seriously enough to treat the patient.