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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| Type | Description | Image |
|---|---|---|
| Type 1 | Separate hard lumps, like nuts |  |
| Type 2 | Sausage-shaped but lumpy |  |
| Type 3 | Like a sausage or snake but with cracks on its surface |  |
| Type 4 | Like a sausage or snake, smooth and soft |  |
| Type 5 | Soft blobs with clear-cut edges |  |
| Type 6 | Fluffy pieces with ragged edges, a mushy stool |  |
| Type 7 | 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.
Page last updated: July 15, 2011
