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Bristol Stool Scale

The Bristol Stool Scale (or Bristol Stool Chart) is a diagnostic medical tool designed to classify the form of human faeces into seven categories. It is used in both clinical and experimental fields.


  • UK: /ˈbrɪstəl stuːl skeɪl/
  • US: /ˈbrɪstəl stul skeɪl/


The term "Bristol" refers to the city of Bristol, England, where the scale was developed by researchers at the University of Bristol. The term "stool" is a common medical term for faeces, and "scale" refers to the grading system used to classify the faeces.


The Bristol Stool Scale is a chart which details seven types of stool, from Type 1 (hard lumps like nuts) to Type 7 (watery, no solid pieces). It is used by medical professionals to help diagnose conditions such as irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and other gastrointestinal disorders.

Related Terms

  • Faeces: The waste matter discharged from the bowels after food has been digested; excrement.
  • Gastrointestinal tract: The stomach and intestine as a functional unit.
  • Irritable bowel syndrome: A common disorder that affects the large intestine and causes symptoms like abdominal pain and irregular bowel movements.
  • Inflammatory bowel disease: An umbrella term used to describe disorders that involve chronic inflammation of your digestive tract.

See Also

External links


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