Blood in stool can appear in several different ways depending on the source and location of the bleeding within the gastrointestinal (GI) tract:
- Bright red blood : This usually indicates bleeding from the lower part of the GI tract, such as the rectum or anus. It may appear as bright red streaks on the stool, drops of blood in the toilet, or blood on toilet paper after wiping. This is often caused by hemorrhoids, anal fissures, or inflammation near the anus
- Dark red or maroon blood : This suggests bleeding from higher up in the colon or small intestine. The blood may be mixed with the stool, giving it a darker red or maroon appearance
- Black, tarry stool (melena) : This typically indicates bleeding from the upper GI tract, such as the stomach or esophagus. The stool looks black and sticky due to the blood being digested as it passes through the intestines. It may also have a foul smell. Causes include stomach ulcers or bleeding in the stomach
- Blood clots or blood mixed with mucus : Sometimes blood may appear as clots or mixed with mucus in the stool, which can also indicate bleeding somewhere in the GI tract
In summary, blood in stool can look like bright red streaks or drops, dark red or maroon coloring mixed with stool, or black tarry stool depending on the bleeding site. Any appearance of blood in stool warrants medical evaluation to determine the cause
