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What causes blood in stool and change in bowel habit? 11 possible conditions

See a list of possible causes in order from the most common to the least.



Hemorrhoids, also called piles, are swollen veins located around the anus or in the lower rectum. Internal hemorrhoids develop within the anus; external hemorrhoids develop outside of the anus. Of the two forms...

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Colonic (Colorectal) Polyps

Colonic polyps are growths that appear on the surface of the large intestine. A person may have more than one polyp, and they may be flat or raised, benign or cancerous.

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Colitis is inflammation of the colon, often causing discomfort and pain in the abdomen, as well as other gastrointestinal symptoms. Colitis has many possible causes, which determine the type.

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Constipation refers to infrequent bowel movements with hard, dry stools. Poor diet and dehydration are usually to blame, though certain diseases or other medical issues are possible causes.

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Ulcerative Colitis

Ulcerative colitis is an inflammatory bowel disease. It occurs when the lining of the large intestine (colon or bowel) and the rectum become inflamed.

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Proctitis is a condition in which when the lining tissue of the inner rectum becomes inflamed. The rectum is part of your lower digestive system.

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Anal Fissure

An anal fissure is a small cut or tear in the skin lining the anus. Childbirth, straining during bowel movements, or bouts of constipation or diarrhea can all tear the anal lining. Anal fissures are usually not a caus...

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Diverticula are bulging sacs that can appear in the lining of your large intestine. Diverticulitis occurs when these sacs get acutely infected or inflamed.

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Colorectal (Colon) Cancer

Colorectal cancer is a cancer that originates in the rectum or colon. Both of these organs are located at the lower portion of your digestive system. The colon is at the end of the large intestine and the rectum is a...

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Crohn’s Disease

Crohn's disease is a chronic bowel disease that causes severe inflammation of the digestive tract. It is associated with abdominal pain, diarrhea, and may affect your quality of life. Crohn's disease is characterized b...

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Anal Cancer

Anal cancer is an uncommon cancer in the anal canal. It's easy to mistake symptoms of anal cancer for other conditions such as hemorrhoids, which could delay a diagnosis. Human papillomavirus is closely related to ana...

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.