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What causes blood in stool and pain? 26 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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Peptic Ulcer

Peptic ulcers are painful sores in the lining of the stomach, esophagus, or small intestine. Peptic ulcers are a fairly common health problem.

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The Many Sides of Bacterial Gastroenteritis

Bacterial infections are common causes of gastrointestinal infections. This type of infection is also called "food poisoning" and is often caused by poor hygiene or ingesting foods contaminated with bacteria.

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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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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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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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E. coli Infection

E. coli is a type of bacteria normally found in intestines. But certain kinds of E. coli can cause infection and severe symptoms like diarrhea and dehydration.

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Stomach Ulcer

Stomach ulcers are painful sores in the stomach lining or small intestine. They occur when the mucus that protects the stomach from digestive juices is reduced.

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Food Poisoning

This condition is considered a medical emergency. Urgent care may be required.

Food poisoning occurs when you consume foods contaminated with bacteria, viruses, or parasites. Symptoms are usually uncomfortable but not severe.

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Ischemic Colitis

Ischemic colitis (IC) is inflammation of the large intestine (colon). IC occurs when not enough blood flows to the colon. Abdominal pain is a common symptom.

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Viral Gastroenteritis

Viral gastroenteritis, also known as the stomach flu, is caused by a number of different viruses. Its symptoms usually last for two to three days.

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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 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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This condition is considered a medical emergency. Urgent care may be required.

Bleeding can refer to blood loss inside the body (internal bleeding) or blood loss outside of the body (external bleeding). It can cause bruising, pain, and symptoms of shock. Too much bleeding can lead to death.

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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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Alcoholic Liver Disease

Damage to the liver from excessive drinking can lead to ALD. Years of alcohol abuse cause the liver to become inflamed and swollen. This damage can also cause scarring known as cirrhosis. Cirrhosis is the final stage o...

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Amebiasis is a parasitic infection, common in the tropics and caused by contaminated water. Symptoms can be severe and usually start 1-4 weeks after exposure.

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The number one symptom of shigellosis, a bacterial infection, is diarrhea. Its symptoms vary in intensity, so you can have this infection and not know it.

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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.