What should you know about thick tarry stool?
Updated

Short answer
Thick, black, tarry stool can indicate bleeding in the upper digestive tract and needs urgent medical assessment.
This answers one question. It is not a diagnosis and does not replace an assessment by a licensed doctor.
At a glance
- Appearance
- Tarry stool is black, sticky, and often unusually strong-smelling.
- Action
- Arrange urgent medical assessment.
- Emergency signs
- Fainting or vomiting blood requires emergency help.
Why tarry stool matters
Digested blood can make stool black, sticky, and tar-like, often with an unusually strong smell. Possible sources include Gastritis, a Peptic Ulcer, or irritation linked with Helicobacter Pylori Infection. Some foods, iron products, and medicines can also darken stool, but a genuinely tarry texture should not be dismissed based on colour alone. Blood loss may cause tiredness, dizziness, weakness, fast heartbeat, or pale skin, even when abdominal pain is absent.
What to do next
Contact urgent medical services or attend an emergency department for new tarry stool, particularly if it has happened more than once. Do not take anti-inflammatory painkillers such as ibuprofen unless a clinician has specifically advised them. Bring a list of medicines and supplements, and note when the stool began, its appearance, and any vomiting or abdominal symptoms. Do not drive yourself if dizzy or faint.
When to seek emergency help
Call emergency services for fainting, confusion, severe weakness, vomiting blood, chest pain, severe abdominal pain, or trouble breathing. Urgent assessment is also needed for repeated black stools, dizziness on standing, or a rapid pounding heartbeat. A clinician may check circulation, blood count, medicines, and the digestive tract to find the source.
Questions for your doctor
Ask whether your medicines or supplements could contribute, whether testing for Helicobacter Pylori Infection is appropriate, and how to protect the stomach while the cause is investigated. Mention previous ulcers, gastritis, alcohol use, and any recent vomiting.
Find care
General Clinics & Polyclinics in Dubai
That answer is general. If you want it applied to your own case, these are licensed general clinics & polyclinics listed in Dubai.
The Court Residence, 39B Street, Jumeirah 1, Dubai
Accepts: Tabby, Tamara
Elite Business Bay Residence - Shop 03 & 04, 34 Marasi Dr - Business Bay - Dubai - United Arab Emirates
Accepts: Tabby
Airport View Building, Al Garhoud, Dubai
Accepts: Daman, Thiqa, AXA, Cigna +25 more
IBIS Building, 5th Floor, Unit 5003, Deira, Dubai
Accepts: AXA, Cigna, MetLife, Allianz Care +18 more
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 UAE health regulators' public licence registers. It is not a referral, an endorsement, or advice that any of these providers is right for you.
Questions people ask
Can iron make stool black?
Yes, iron can darken stool, but sticky tar-like stool or other warning symptoms still need medical assessment.
Is tarry stool always painful?
No. Digestive bleeding can occur without abdominal pain, so the appearance should be taken seriously.
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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.