The amount of upper gastrointestinal bleeding is judged as follows: 1. If the color of the stool is normal as observed by the naked eye, and the result of the stool laboratory test is positive for occult blood, the amount of bleeding is usually around 5 ml, and at most 50 ml. 2. If black stool has been observed by the naked eye, or dark red stool, the amount of bleeding should be 50-100 ml. 3. If the stool is tarry black stool or dark red bloody stool, and 4.If the bleeding volume in a short period of time is relatively large, accompanied by vomiting blood, black stool, panic, chest tightness, sweating, etc., and blood pressure also decreases, the heart rate appears to increase, greater than 120 times/min, the bleeding volume should be in 1000 ml, or even up to 1500 ml. Some patients may experience shock Some patients may be prone to gastrointestinal hemorrhagic shock, leading to coma, and the bleeding volume may be more than 2000ml.