What does it mean if there is blood in the stool?

Hemorrhage from the anus, which may be caused by various reasons, mainly includes: 1. Hemorrhoids: Especially internal hemorrhoids, often presenting as painless rectal bleeding with fresh blood adhering to the surface of stool or dripping after defecation. 2. Anal fissure: Caused by dry, hard stools tearing the anal mucosa, often accompanied by anal pain and bright red blood. 3. Intestinal diseases: Such as rectal polyps, rectal prolapse, colitis, and intestinal tumors, which may also cause rectal bleeding, with specific symptoms varying according to the condition. 4. Systemic diseases: Such as coagulation disorders, blood diseases, peptic ulcer disease, etc., which may lead to anal bleeding, usually accompanied by other systemic symptoms.