Stool

 

Bristol Stool Chart: What your stool shape can mean:

➟ The Bristol Stool Chart groups stool into 7 types to help describe bowel habits and gut transit time (how fast stool moves through the colon).

➟ Occasional changes are normal, but persistent patterns can signal constipation, diarrhea, diet issues, or illness.

Constipation types (slow transit)

➟ Type 1

→ Separate hard lumps (like nuts), very hard to pass

➟ Type 2

→ Sausage-shaped but lumpy

➟ These usually mean:

→ Not enough water/fiber, sedentary lifestyle, certain meds (iron, opioids), or chronic constipation

Normal/healthy range

➟ Type 3

→ Sausage with cracks on the surface

➟ Type 4

→ Smooth, soft “sausage/snake” (often the ideal)

➟ Usually suggests:

→ Balanced fiber + hydration + healthy transit time

Loose stool/diarrhea types (fast transit)

➟ Type 5

→ Soft blobs with clear edges (can happen with low fiber)

➟ Type 6

→ Mushy, fluffy pieces with ragged edges

➟ Type 7

→ Watery, entirely liquid

➟ Common causes include:

→ Infection (“stomach bug”), food intolerance, stress/IBS, antibiotics, excess caffeine, inflammatory bowel disease (in some cases)

When to see a doctor (red flags)

➟ Blood in stool or black stools

➟ Unexplained weight loss, fever, persistent vomiting

➟ Diarrhea >3 days with dehydration, or chronic diarrhea >2–3 weeks

➟ Severe constipation with pain, vomiting, or inability to pass gas

➟ New bowel habit change after age 45–50

Medical Disclaimer

This information is for educational purposes only and does not replace medical advice. Stool appearance can vary with diet, hydration, medications, and illness. If you have persistent constipation/diarrhea, severe pain, blood in stool, fever, dehydration, or sudden major changes in bowel habits, consult a healthcare professional promptly.