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Hemorrhoids, anal fissures, diverticulosis and colon polyps are the most common causes of blood in the stool, as confirmed by MedicineNet. Blood in the stool ranges in color from bright red to black.


Blood in the stool is primarily caused by bleeding somewhere along the gastrointestinal tract, states WebMD. This internal hemorrhaging can be attributed to several disorders and diseases, including hemorrhoids, diverticular disease, anal fissures, colitis, polyps and tumors, angiodysplasia, Crohn's


Some of the main causes of blood in the stool are diverticular disease, anal fissures, colitis and angiodysplasia, according to WebMD. Other causes of blood in the stool are peptic ulcers, polyps, cancer or health issues related to the esophagus.


Fresh rectal bleeding is usually caused by hemorrhoids or an anal fissure, according to Boots WebMD. The brightness of the blood indicates that the bleeding is fairly recent and near the anus, or somewhere low in the digestive tract, states WebMD.


Large stools are typically caused by constipation, which is a common symptom of conditions such as pregnancy, encopresis and hemorrhoids, according to Healthline, the University of Maryland Medical Center and WebMD. Constipation may also result in large hardened stools that tear parts of the anus, r


In some cases black stool indicates bleeding in the upper intestinal tract or stomach, which requires prompt medical attention, according to Mayo Clinic. Other possible causes of black stool include black liquorice, iron supplements, and medications such as Pepto-Bismol and Kaopectate.


The causes of dark stools include certain medications, certain foods and bleeding in the upper portion of the digestive system, including the esophagus, according to Healthline. Less frequently, severe circulation problems in the digestive system may lead to dark stools.


Symptoms that indicate blood in the stool are finding blood in the stool itself or on toilet paper or passing stool that is tarry and black, explains WebMD. Other signs and symptoms are pain in the abdomen, diarrhea, vomiting, heart palpitations and fainting.


A person's diet and the amount of bile in his stool cause his stool to have different colors, according to Mayo Clinic. Certain medications, supplements and diseases also cause stool to change color.


Causes of mucus in the stool include dehydration, constipation and gastrointestinal inflammatory conditions, such as irritable bowel syndrome, Crohn's disease and rectal ulcers, states Healthline. Conditions such as diverticular disease, anal fissure, peptic ulcers and gastroenteritis can cause bloo