Symptoms of gastrointestinal bleeding depend on the primary disease, the amount of blood loss, the speed of bleeding and the location of the bleeding. When the bleeding is small, the symptoms are light, or even without any performance; when the bleeding is obvious, it can be seen as vomiting blood, black stool, blood in the stool and so on; when the blood loss is large, it can be panic, dizziness and other shock manifestations. 1. Vomiting blood: Vomiting blood is often seen in upper gastrointestinal bleeding, and there will be vomiting blood in case of large amount of bleeding. When the bleeding rate is slow, the color of blood is brown or coffee, and when the bleeding rate is fast, it is bright red or there are blood clots, which may be mixed with stomach contents. 2. Black stools: Black stools can be seen in upper gastrointestinal tract or high small intestine bleeding. The stool is tarry, sticky and shiny. 3. Blood in stool: blood in stool is often seen in lower gastrointestinal bleeding, but when upper gastrointestinal bleeding >1000ml, blood in stool is also seen, and the stool is dark red, or even fresh blood is discharged. 4. Hemorrhagic shock: when the bleeding rate is fast, the amount of bleeding is large in a short time, which will be accompanied by dizziness, panic, fatigue, or even fainting, cold and wet limbs, accelerated heart rate, decreased blood pressure, and other microcirculation insufficient perfusion manifestations. 5. Anemia: long-term chronic gastrointestinal bleeding can be iron deficiency anemia, such as pale, dizziness, fatigue and so on. 6. Fever: after a large amount of gastrointestinal bleeding, some patients have a low-grade fever within 24 hours, which can be reduced to normal after 3-5 days. Of course, the symptoms of gastrointestinal bleeding varies from person to person, once the patient vomits blood, black stools and other symptoms of gastrointestinal bleeding, it is necessary to consult the hospital in time to find out the cause of the disease and stop bleeding in time, so as to avoid delaying the condition and even endangering the life.