What should you know about black foul smelling stool?

A strong, unusual odour together with black, sticky, tar-like stool may reflect bleeding from the stomach or upper intestine. Gastritis can irritate the stomach lining, while a peptic ulcer can bleed; Helicobacter Pylori Infection is one possible contributor to these conditions. Iron, bismuth, and dark foods can also change stool colour, and digestive changes can alter its smell. Odour by itself cannot diagnose bleeding, but a new black bowel movement should not be dismissed when there is no clear harmless explanation.

Note when the change began, how many bowel movements look this way, and whether they are sticky or difficult to flush. Gather details of iron, bismuth, aspirin, anti-inflammatory painkillers, alcohol use, and recent foods for the clinician. Seek prompt medical advice rather than relying on smell or waiting for the colour to settle. Do not take extra anti-inflammatory painkillers while awaiting advice.

Call emergency services or attend an emergency department for faintness, collapse, confusion, severe weakness, shortness of breath, severe abdominal pain, vomiting blood, or vomit resembling coffee grounds. These signs can occur with important blood loss. Same-day medical review is sensible for persistent or unexplained black foul-smelling stool, even when you feel stable.

Could my medicines or recent food explain both the colour and odour? Do I need assessment for gastritis, Helicobacter Pylori Infection, or peptic ulcer bleeding? What warning signs should prompt emergency care?