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However, Sonpal stresses that you should never assume your bleeding is just a hemorrhoid and that you should see your doc for an official diagnosis (donât be shyâwe swear, theyâve seen everything!). In some instances, blood in your stool could mean colorectal cancer. Itâs important to note, though, that the amount of blood is often unnoticeable to the regular eyeâso the rule of thumb is prevention, prevention, prevention.
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 the stool range from harmless, annoying conditions of the gastrointestinal tract such as hemorrhoids to serious conditions such as cancer.he blood is found only by testing the stool for blood (fecal occult blood testing) in the laboratory. Occult bleeding has many of the same causes as rectal bleeding and may result in the same symptoms as rectal bleeding.