The amount of bleeding in the digestive tract to determine the severity of the disease in general, 1, the amount of bleeding is less in 5-10ml, if the disease is relatively mild, can only be checked inside the occult blood in the stool, the naked eye can not see. 2, the amount of bleeding in 50-100ml, suggesting that the stool occult blood is positive, and the amount of bleeding is slightly more, some may appear some weakness and other symptoms, but not obvious, the disease is also relatively mild. 3, when the bleeding volume is less than 400ml or less, some symptoms such as weakness, dizziness, nausea and chest tightness will appear. 4, the bleeding volume is relatively large, the condition is more dangerous, the bleeding volume reaches 400ml or more, hypovolemia will occur, cold sweat, chest tightness, weakness and even fainting as well as shock and other Symptoms, at any time will be life-threatening.