# Bristol stool chart: the 7 types, in plain words

The Bristol stool scale sorts stools into seven types, from separate hard lumps (type 1) to entirely liquid (type 7). Types 3 and 4 are the usual middle. Types 1 and 2 suggest slow transit or constipation, and types 6 and 7 fast transit or diarrhoea. A one-off change is common; a change that lasts or comes with warning signs is worth checking with a doctor.

## How it works

### Why track it

One day says little. A pattern over a couple of weeks, next to fibre, water, sleep and stress, can show what helps you. Logging takes one tap.

### When to see a doctor

Blood in or on the stool, black or tarry stools, a change in habit lasting more than three weeks, unexplained weight loss, or pain that will not settle. These need a professional, not an app.

## Questions

### What is a normal Bristol stool type?

Types 3 and 4 are the usual middle. Many people vary between days, which is normal.

### How often should you poop?

Anywhere from three times a day to three times a week is common. A change from your own usual pattern matters more than a number.

### What helps with type 1 and 2 stools?

Common first steps are more fibre (fruit, vegetables, whole grains, legumes), enough fluid and regular movement. If it persists, talk to a pharmacist or doctor.

### Is it worth tracking bowel movements?

It can be useful for spotting patterns with food, sleep or stress, and for describing changes clearly to a clinician.

## Sources

- [Lewis SJ, Heaton KW. Stool form scale as a useful guide to intestinal transit time. Scand J Gastroenterol 1997](https://pubmed.ncbi.nlm.nih.gov/9299672/)
- [NHS. Constipation](https://www.nhs.uk/conditions/constipation/)
- [NHS. Bowel cancer symptoms](https://www.nhs.uk/conditions/bowel-cancer/symptoms/)

Accurate as of November 12, 2026.

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revns gives training guidance, not medical advice.