Soft tissue images. Melanosis Coli CJS MALENA: Melena is the medical term for black, tarry stools caused by the presence of digested blood. It typically indicates bleeding in the upper gastrointestinal (GI) tract, such as the: Stomach Duodenum CONSTIPATION What does your poop colour indicate? Pay attention. There's a lot to be learned by the colour and consistency of your stools, as well as the frequency and how easily passed MELANOTAN 2 VIAL, (10MG) Don't Ignore If Your Stool Color Changes Suddenly Comment POOP and I'll send you the stool guide I use with my patients. Trust your gut. Follow @doctor.sethi for no BS gut science