Dark or black tarry stools

Overview

Dark or black tarry stools, medically known as melena, are sticky, foul-smelling bowel movements that appear black due to the presence of digested blood. This symptom typically indicates bleeding in the upper digestive tract, including the stomach or small intestine.

Common Causes

This condition commonly occurs when blood from the upper digestive tract (stomach or small intestine) has been digested and darkened as it passes through the intestines. It can result from medications like iron supplements, bismuth-containing products (such as Pepto-Bismol), or certain foods like black licorice and blueberries. Stomach ulcers, gastritis, or irritation from anti-inflammatory medications can also cause bleeding in the upper digestive system. In some cases, it may indicate more serious conditions affecting the stomach or upper intestines that require medical evaluation.

Severity Levels

Mild: Occasional dark stools with minimal other symptoms may warrant monitoring and dietary review, but should still be evaluated by a healthcare provider within a few days.

Moderate: Regular dark, tarry stools accompanied by fatigue, weakness, or mild abdominal discomfort require prompt medical attention within 24 hours as this suggests ongoing internal bleeding.

Severe: Dark stools with dizziness, rapid heartbeat, severe weakness, vomiting blood, or fainting indicate significant blood loss and require immediate emergency medical care.

Medical Attention

Seek immediate medical attention if you experience this symptom, especially if accompanied by weakness, dizziness, vomiting blood, or severe abdominal pain. Contact your healthcare provider promptly even if you feel otherwise well, as this can indicate serious internal bleeding that requires urgent evaluation. Do not wait to see if the symptom resolves on its own, as early medical intervention is crucial for proper diagnosis and treatment.

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