Home Diseases Stool Color Chart, Meaning of Form & Texture Changes

Stool Color Chart, Meaning of Form & Texture Changes



Stool color changes can be caused by a number of underlying conditions.

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Rectal Bleeding (Blood in Stool, Hematochezia)

Causes of Blood in Stool

Blood in the stool can be bright red, maroon in color, black and tarry, or occult (not visible to the naked eye). Causes of blood in stool range from harmless, annoying conditions of the gastrointestinal tract such as hemorrhoids to serious conditions such as cancer.

Stool, feces, or poop is the waste product of digestion.

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Stool samples are taken to test for causes of stool color changes.

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Eating beets can be a harmless cause of stool color changes.

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Worst Foods for Digestion
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Stool color changes to yellow can signal undigested fats.

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Black stool and tarry stool can be a worrisome sign of GI bleeding.

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Stool color changes to a pale or clay color could signal a bile blockage.

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Prescription drug labels often include stool color changes as a warning.

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Floating stool is caused by excess gasses.

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Stool color changes and changes in size may happen occasionally.

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Call your health-care professional if you have any troublesome stool color changes.

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Medically Reviewed on 10/15/2020


Rakel, R.E., and D. Rakel. Textbook of Family Medicine, 9th Edition. Saunders, 2015.


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