What should you know about black looking stool?

Notice more than colour. Melaena is often black, sticky, and difficult to wipe away, with a strong unpleasant smell. Iron and bismuth medicines can also turn stool black without bleeding, and dark foods may temporarily alter its appearance. Gastritis can inflame the stomach lining and a peptic ulcer can cause bleeding higher in the digestive system. Helicobacter pylori infection may be linked with ulcer disease. These possibilities overlap, so stool colour should be interpreted alongside pain, vomiting, weakness, bowel changes, and the products you use.

Take a clear note of the stool’s texture and timing, and check recent meals, vitamins, and medicines. Do not discard packaging for a new supplement or stomach remedy; its ingredients may help explain the change. If black stool is unexplained, repeated, or tar-like, contact a clinician promptly. Tell them about abdominal symptoms, previous ulcers, and medicines such as anti-inflammatory pain relievers. Avoid changing prescribed treatment until a professional has reviewed it.

Emergency assessment is needed if black stool occurs with fainting, severe dizziness, unusual weakness, breathlessness, confusion, severe abdominal pain, or vomiting blood or dark granular material. Those signs can accompany digestive bleeding. If you feel faint, lie down and have someone help you. Repeated black stool without obvious staining from food or medicine also deserves prompt evaluation, even when pain is absent, because bleeding is not always painful.

Does the texture sound like melaena? Could my iron, bismuth, or food explain the appearance? Do my symptoms suggest gastritis or a peptic ulcer? Should I be assessed for Helicobacter pylori infection?