If you have diarrhea and bleeding, you should consider whether you have gastrointestinal bleeding, pathogenic microbial infection and hemorrhoids, anal fissure, etc. The typical symptoms of bacterial dysentery are mucopurulent stools, fever, nausea and vomiting. Bleeding diarrhea from this cause is usually associated with unclean diet, such as eating overnight meals or food contaminated with dysentery bacilli. For patients with gastrointestinal ulcers, bleeding may also occur due to destruction of the gastrointestinal mucosa, and if the condition is serious and bleeds too much too fast, bleeding may also occur during diarrhea. Infection by intestinal parasites can also cause bleeding due to destruction of the mucous membrane and blood vessels of the intestine, and this symptom can also occur if there are too many parasites and the intestinal wall is severely damaged. In addition, hemorrhoids are one of the main causes of bleeding diarrhea. The varicose veins of the hemorrhoid plexus, combined with the downward movement of blood and gas during diarrhea, can cause the hemorrhoid to crack and bleed, accompanied by a strong painful sensation. Also, anal fissures are a common cause of bleeding from diarrhea, and this blood is usually bright red and can also be accompanied by a very strong anal pain. There are many causes of bleeding diarrhea, including enteritis hemorrhoids anal fissure, etc. If it is also accompanied by long-term abdominal pain, bloating, low fever and other symptoms, it is best to go to a regular hospital to do some tests to clarify whether there is a malignant disease.