Stool Consistency Guide

A stool consistency scale is a clinical tool used to classify stool consistency. It helps you and your doctor communicate about bowel patterns objectively.

Type 1Constipated

Separate hard lumps

Like nuts — very hard to pass

Type 2Constipated

Lumpy and sausage-like

Hard and lumpy

Type 3Typical

Sausage with surface cracks

Normal, slightly dry

Type 4Typical

Smooth and soft

Ideal — easy to pass

Type 5Loose

Soft blobs, clear edges

Lacking fiber

Type 6Loose

Fluffy, mushy pieces

Loose, mild diarrhea

Type 7Loose

Watery, no solid pieces

Severe diarrhea

What's considered typical?

Frequency: Anywhere from 3 times per day to 3 times per week is considered within the normal range for most adults.

Form: Types 3 and 4 are generally considered ideal — formed, soft, and easy to pass without straining.

Consistency: Occasional variation is normal. It's persistent patterns (weeks of Types 1–2 or 6–7) that are worth discussing with your doctor.

IBS Subtypes

IBS-C (Constipation-predominant)

Characterized by hard, lumpy stools (Types 1–2) more than 25% of the time, with loose stools less than 25% of the time.

IBS-D (Diarrhea-predominant)

Characterized by loose, watery stools (Types 6–7) more than 25% of the time, with hard stools less than 25% of the time.

IBS-M (Mixed)

1267

Alternating between constipation and diarrhea. Both hard stools (Types 1–2) and loose stools (Types 6–7) more than 25% of the time.

IBS-U (Unclassified)

345

Stool consistency does not fit the other three subtypes. Symptoms vary without a consistent pattern.

Note: IBS subtype classification is done by a healthcare provider based on your symptom history. IBSTrack's pattern cards are observational only and do not diagnose IBS or its subtypes.

Common IBS Triggers

Stress and anxiety

The gut-brain axis means psychological stress can directly affect bowel motility.

Dietary FODMAPs

Fermentable carbohydrates (onions, garlic, wheat, dairy) can trigger symptoms in sensitive individuals.

Caffeine and alcohol

Both can stimulate bowel activity and worsen urgency or diarrhea.

Irregular meal timing

Skipping meals or eating very late can disrupt the gastrocolic reflex.

Hormonal changes

Many people with IBS notice worsening symptoms around their menstrual cycle.

Antibiotics and medications

Gut microbiome disruption from antibiotics can trigger or worsen IBS symptoms.

Educational content only. This guide is for informational purposes. This scale is a clinical communication tool — it does not diagnose conditions. Always consult a qualified healthcare provider for diagnosis and treatment of digestive symptoms.