Bleeding in the stool after an enema should be analyzed specifically. If the mucous membrane of the intestinal wall bleeds because the enema is rough and the enema rubs against the intestinal wall, this may not have anything to do with the disease itself. If there are previous hemorrhoids or rectal ulcers, bleeding from the vascular mass of the hemorrhoids or the ulcer mask may occur during the enema. This usually occurs when there is fresh blood on the surface of the stool, rather than black stool mixed in with the stool. If blood in the stool after an enema manifests itself not as fresh blood on the surface but as saucy red or saucy purple blood mixed with the stool, the presence of gastrointestinal bleeding needs to be considered. The best test is to perform gastroscopy and colonoscopy to rule out organic lesions in the gastrointestinal tract, such as gastrointestinal polyps, ulcers, tumors, etc.