Dark stool but not black: what it can mean

Stool colour changes with food, bile, and how quickly material moves through the gut. Dark foods or iron supplements can deepen the colour without causing illness. A sticky, shiny, tar-like appearance is different from ordinary dark brown stool and can indicate digested blood from higher in the digestive tract. Causes that doctors may consider include gastritis, Helicobacter Pylori Infection, and Peptic Ulcer. The colour alone cannot identify the cause, so note whether the change repeats and whether the stool is unusually difficult to flush.

Look at the next bowel movements in good light and record recent foods, iron, bismuth-containing medicines, or other new products. Do not stop a prescribed medicine without advice. Drink normally and arrange a clinical review if the darker colour continues, returns, or has no clear food or supplement explanation. A clinician may ask about abdominal discomfort, medicines, bowel habits, and may recommend stool or blood testing.

Seek urgent care if stool becomes black and tarry, or if dark stool occurs with vomiting blood, faintness, marked weakness, confusion, severe abdominal pain, or shortness of breath. Get prompt medical advice for repeated dark stools, increasing tiredness, or symptoms of blood loss even when the colour is not fully black.

Could my medicines or supplements explain the colour? Does the texture suggest bleeding? Which examination or test would clarify the cause? What changes should make me seek urgent help?