Different stool colours can provide important clinical clues related to digestion, bleeding, liver disease, malabsorption, infection, or bowel inflammation. Disclaimer For educational purposes only. Not medical advice. Consult a qualified Hematochezia vs melena: Comparing symptoms, causes, and treatment Melaena appearance, causes, mechanism, sign value The color of your stool: what does it say about your health? Insentials Black, tarry stools are NOT normal. They could be a sign of Melena upper gastrointestinal bleeding that requires urgent medical attention. Learn the difference between Melena vs Hematochezia, common