The symptom of blood pulling after doing colonoscopy may be the existence of internal hemorrhoids and thus induced blood in stool, and may also be in the process of doing colonoscopy, for the intestinal tract to cause a certain amount of damage, which in turn induced bleeding. If there are intestinal polyps in the patient, after taking the pathological tissue will also cause the symptom of blood pulling, and the amount of bleeding is relatively small, you can generally first observe, if 2-3 days or so the bleeding is significantly reduced or stopped, there is no need for special treatment. However, if the stool is mixed with blood and lasts for a longer period of time, the bleeding may be caused by intestinal injury, and it is recommended that drugs such as snake venom thrombin and hemostatic minerals can be chosen to stop the bleeding. Meanwhile, the diet should be light, avoid cold and stimulating, hot and dry food, choose light, easy to digest fluid food, so as not to irritate the intestinal tract.