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Bright orange specks may show up in your bowel movements, though this should not actually color your bowel movements orange. Dr. Paredez continues, âOrange diarrhea may be the result of infectious diarrhea, which causes rapid transit through the intestine, which limits the amount of bile in the stool. Bile duct cancer and pancreatic cancer are the life-threatening medical conditions that can result in orange diarrhea.
False MelanaA black stool caused by food, supplements, medication, or minerals is known as false melena.. Iron supplements, taken alone or as part of a multivitamin for iron-deficient anemia, may cause stools to be black or even greenish in color. Foods that are dark blue or black in color may also cause black stools. Substances that can cause false melena are: