Bristol type 5 stool: soft blobs with clear edges

Soft blobs with clear-cut edges. Type 5 is the mildest of the loose types, and an occasional one is common. Here is what tends to cause it, what may help, and when a run of them is worth a check.

Updated October 21, 2026 · 5 min read · By the Log For Your Log team · 8 sources

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General information, not medical advice. This page can help you notice patterns and talk with a clinician. It cannot tell you what is causing a symptom.

What type 5 looks like

On the Bristol stool chart, type 5 is soft blobs with clear-cut edges (Cleveland Clinic). The pieces still hold their shape, which is what separates it from type 6, where the pieces are fluffy and mushy with ragged edges.

Continence Health Australia groups types 5 to 7 as signs of diarrhea or urgency, and says healthy stools should be soft, well formed and easy to pass, like types 3 and 4. Cleveland Clinic explains that loose types happen when your bowels move too fast and do not absorb enough water. In the 1997 study the chart comes from, stool form was the best simple guide to how quickly things moved through the gut (Lewis and Heaton).

Is type 5 normal?

Now and then, yes. Cleveland Clinic says it is normal to have a hard or mushy poop now and then, and that what you eat and how much water or alcohol you drink can affect your stools from day to day.

Whether it counts as diarrhea depends on how often it happens. NIDDK defines diarrhea as loose, watery stools three or more times a day, or more often than is normal for you. A single type 5 after a big dinner is a soft day. Several a day, or type 5 most days when you are usually a type 4, is a pattern worth looking at.

Common reasons for type 5

Many causes of loose stools are everyday ones that a log can help you spot:

• Sugar alcohols. NIDDK says sorbitol, mannitol and xylitol, common in sugar-free sweets and gum, may cause diarrhea in some people.
• Certain sugars. NIDDK describes lactose intolerance (milk and milk products) and dietary fructose intolerance (fruit, fruit juice, honey and many sweetened foods and soft drinks) as causes of diarrhea after those foods.
• After a stomach bug. NIDDK says some people have trouble digesting lactose for up to a month or more after acute diarrhea.
• Medicines. NIDDK lists antibiotics and antacids containing magnesium among medicines that may cause diarrhea. Talk to a pharmacist or doctor before changing anything you take.
• Stress and anxiety. The NHS lists anxiety as a cause of diarrhea, along with food intolerance, irritable bowel syndrome and other conditions.

What may help

For mild loose stools like type 5, Cleveland Clinic says you might be able to bulk up your stools by eating more fiber. It also notes that chronic loose stools sometimes have a simple cause, such as an unknown food intolerance or a medicine, and might go away once that food or medicine is found and removed.

• Keep a food journal. NIDDK suggests tracking what you eat and drink, what symptoms you have, when they happen, and which foods seem to make them worse, then taking those notes to your doctor. Our food and symptom diary guide shows how.
• Look at drinks too. For acute diarrhea, NIDDK suggests avoiding alcohol, caffeine, drinks high in simple sugars, and sugar alcohols. These are also easy things to test one at a time if type 5 keeps coming back.
• Stay hydrated. The NHS says the most important thing with diarrhea is to drink lots of fluids to avoid dehydration.
• Change one thing at a time. If you cut caffeine and add fiber in the same week, you will not know which one mattered.

What a useful log entry looks like

Type 5 is easiest to understand next to what came before it. A short note with each entry is enough. For example:

• Thursday 7:30 am: type 5, brown. Note: 2 coffees before 9, sugar-free gum all afternoon yesterday.
• Thursday 11:00 am: type 5. Note: a bit urgent, no pain.
• Monday 8:00 am: type 4. Note: switched to regular gum, one coffee.

When type 5 needs a doctor

The NHS lists changes in your poo, such as having softer poo, diarrhea or constipation that is not usual for you, and needing to poo more or less often than usual, among the symptoms to see a GP about. The NHS stresses that these symptoms are very common and can be caused by other conditions, and asks people not to be embarrassed, because doctors are used to talking about them.

NIDDK says adults should talk with a doctor right away for diarrhea lasting more than 2 days, a high fever, six or more loose stools a day, frequent vomiting, severe pain in the abdomen or rectum, stools that are black and tarry or contain red blood or pus, or signs of dehydration. NIDDK calls diarrhea persistent when it lasts longer than 2 weeks and chronic when it lasts at least 4 weeks. See our when to see a doctor guide for the full list.

Sources

1. Bristol Stool Chart, Continence Health Australia
2. Bristol Stool Chart, Cleveland Clinic
3. Stool form scale as a useful guide to intestinal transit time, Lewis SJ, Heaton KW. Scandinavian Journal of Gastroenterology, 1997
4. Definition and facts for diarrhea, NIDDK (NIH)
5. Symptoms and causes of diarrhea, NIDDK (NIH)
6. Eating, diet and nutrition for diarrhea, NIDDK (NIH)
7. Diarrhoea and vomiting, NHS
8. Symptoms of bowel cancer, NHS

How this page was made. Written by the Log For Your Log team with AI drafting help, based on our in-app Learn library, then checked line by line against the sources below. Read how we write Learn.

Keep reading

• Bristol type 6 stool: mushy and loose
• How to keep a food and symptom diary
• When to see a doctor about your poop