What should you know about slightly black stool?

Stool can look darker after iron supplements, bismuth-containing medicines, or strongly coloured foods. Bleeding higher in the digestive tract can also make stool black, sticky, and unusually foul-smelling; this is called melaena. Conditions such as gastritis or a peptic ulcer may irritate or damage the stomach or upper intestine, while Helicobacter Pylori Infection can contribute to ulcer disease.

Colour alone cannot confirm the cause. Think about whether the change began after a new medicine or food, whether it is repeating, and whether you have abdominal discomfort, nausea, dizziness, or unusual tiredness. A clinician may examine you and arrange blood or stool testing based on the history.

Check the label of any iron, bismuth, or charcoal product and note when you took it. Do not stop a prescribed medicine without advice. Avoid taking anti-inflammatory painkillers for unexplained stomach symptoms unless a clinician has advised they are suitable. If the dark stool continues, contact a healthcare professional and describe its texture, smell, frequency, and any related symptoms.

Keep hydrated and avoid alcohol while you are waiting for advice if it worsens stomach discomfort. Bring a list of medicines and supplements to an appointment, including non-prescription products.

Seek emergency help for black tarry stool with faintness, confusion, marked weakness, rapid heartbeat, vomiting blood, or severe abdominal pain. These signs can accompany significant digestive bleeding. Urgent assessment is also needed when black stool appears repeatedly without an obvious food or medicine explanation.

Arrange prompt review for ongoing dark stool, unexplained fatigue, recurring upper abdominal pain, or nausea. Do not wait for the colour to become darker if you feel unwell.

Could my medicines or supplements explain the colour? Does the stool sound tarry rather than simply dark? Do I need tests for bleeding, gastritis, peptic ulcer, or Helicobacter Pylori Infection? Which pain medicines should I avoid?