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Black stools in humans: what to know

Where Black Stools is typically felt, shown on a simplified body outline
Illustration: Where Black Stools is typically felt, shown on a simplified body outline

Short answer

Black stools in humans may reflect food or medicine, but sticky tar-like stool can indicate hidden upper digestive bleeding and needs prompt assessment.

This answers one question. It is not a diagnosis and does not replace an assessment by a licensed doctor.

At a glance

Possible clue
Black and sticky is more concerning than dark brown
Bring
A medicine and supplement list

Common explanations

Black stool can follow iron tablets, bismuth-containing remedies, or darkly pigmented foods. Digested blood from the stomach or upper bowel can also make stool black, especially when it is sticky or tar-like. Red blood does not need to be visible.

Gastritis, peptic ulcer disease, and Helicobacter pylori infection are examples of conditions that may affect this area. Stool appearance is a clue, not a diagnosis.

Plan your next step

Record when the change started, whether it repeats, and its texture. Review recent meals, supplements, and medicines, including non-prescription painkillers. Seek prompt medical advice for persistent or tarry black stool. A clinician can decide whether examination or testing is needed; do not stop prescribed medicines without guidance.

Emergency symptoms

Call emergency services or attend an emergency department for fainting, dizziness, unusual weakness, vomiting blood, severe abdominal pain, confusion, breathlessness, or a fast heartbeat. These signs warrant immediate attention regardless of the suspected cause.

Questions worth asking

Could a food, iron tablet, or bismuth remedy account for this? Does the texture concern you? Should I be assessed for gastritis, an ulcer, or Helicobacter pylori infection?

Find care

General Clinics & Polyclinics in Abu Dhabi

That answer is general. If you want it applied to your own case, these are licensed general clinics & polyclinics listed in Abu Dhabi.

City
See every listing in Abu Dhabi

Ordered by verification status and how complete each clinic's public record is, then alphabetically. This is a directory listing, not a ranking — Zavis does not rate or recommend providers.

A factual listing drawn from the DHA, DOH and MOHAP licence registers. It is not a referral, an endorsement, or advice that any of these providers is right for you.

Questions people ask

What can make stool black?

Iron, bismuth-containing remedies, dark foods, and digested blood are possible explanations.

Is black stool an emergency?

Tarry stool or black stool with faintness, weakness, vomiting blood, or breathlessness needs emergency care.

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Medical disclaimer. This page is general health information, not medical advice, and it cannot diagnose you. Always consult a licensed healthcare provider about your own symptoms and treatment. In an emergency in the UAE, call 998 for an ambulance.