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The Bristol Stool Form Scale provides illustrations of the seven stool types, which can be used to help fill out the stool diary.

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Bristol Stool Form Scale

Type Description Image
Type 1 Separate hard lumps, like nuts Image of separate hard lumps, like nuts
Type 2 Sausage-shaped but lumpy Image of sausage-shaped but lumpy
Type 3 Like a sausage or snake but with cracks on its surface Image of type 3 - like a sausage or snake but with cracks on its surface
Type 4 Like a sausage or snake, smooth and soft Image of type 4 -Like a sausage or snake, smooth and soft
Type 5 Soft blobs with clear-cut edges Image of Soft blobs with clear-cut edges
Type 6 Fluffy pieces with ragged edges, a mushy stool Image of Fluffy pieces with ragged edges, a mushy stool
Type 7 Watery, no solid pieces Image of Watery, no solid pieces

Text reproduced with permission from Lewis SJ, Heaton KW, Scandinavian Journal of Gastroenterology, 1997; 32(9):920–924. ©1997 Informa Healthcare.

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Page last updated: July 15, 2011


 

The Bowel Control Awareness Campaign is a service of the National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health.

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