Blood in stool, also known as rectal bleeding or hematochezia, can be caused by a variety of factors. Some of the most common causes include:

• Hemorrhoids: Swollen veins in the rectum or anus that can bleed when irritated.

• Anal fissures: Small tears in the lining of the anus that can cause pain and bleeding.

• Diverticulitis: Inflammation or infection of small pouches in the colon that can bleed.

• Inflammatory bowel disease (IBD): Chronic inflammation of the digestive tract that can cause bleeding.

• Colorectal cancer: Cancerous growths in the colon or rectum that can cause bleeding.

Other possible causes of blood in stool include infections, ulcers, and blood clotting disorders. The color of the blood can also provide clues about the location of the bleeding. Bright red blood is usually a sign of bleeding in the lower digestive tract, while dark or black stool can indicate bleeding higher up in the digestive tract.

Its important to see a healthcare provider if you experience rectal bleeding, as some causes can be serious and require urgent care. Your healthcare provider can help determine the cause of your bleeding and recommend appropriate treatment.