Living with diarrhoea and a gut that just won't settle is really exhausting. Even if you've had dodgy guts for a few days, there's planning involved to never be far from a toilet. 

But when it's been going on for a while, you'll always be planning life around the loo. Thinking "where's the loo, how long have I got, can I risk that coffee?"

Then there's the tiredness that comes from running on empty, because you're not getting enough nutrients. Plus, the worry about what it all means, and the quiet embarrassment that stops you mentioning it out loud. But your family and colleagues knowing something doesn't feel right with you. 

Hopefully it will reassure you to know that persistent diarrhoea is a recognised, well-understood problem with real, identifiable causes. You don't have have to grit your teeth and endure it. 

This guide walks through what actually counts as "chronic" diarrhoea, the common causes behind it, when to speak to your GP. We also share practical, realistic steps that can help calm things down. 

What Counts as Diarrhoea All the Time?

Acute diarrhoea is the short-lived kind - usually triggered by a tummy bug or food poisoning - that arrives suddenly and settles on its own within a few days. Unpleasant, but you can get over it quite quickly.

Chronic (or persistent) diarrhoea is really quite different. It's loose stools, generally defined as lasting more than about four weeks, or that keep coming back in waves. It can be associated with IBS, or irritable bowel syndrome, as well as other gut disorders. This is the kind that wears you down, precisely because you feel like you don't know what your gut is going to do next. 

So what is diarrhoea, exactly? Medically, it means passing loose or watery stools three or more times a day. On the Bristol Stool Chart - the standard scale doctors use to describe stool consistency - that's Type 6 (mushy, ragged edges) or Type 7 (entirely liquid). Having a clear label for what you're experiencing can make it far easier to describe to your GP.

When people say they have diarrhoea "all the time," they usually mean one of two things: it's there most days, or it comes often in some type of pattern. Either way, spotting that pattern - when it happens, what tends to precede it - is the first real step towards managing it.

It's also worth taking seriously rather than ignoring, because ongoing diarrhoea means you're losing more fluid than usual. That can leave you dehydrated and tired, which only adds to the sense of being run-down. Addressing it isn't an overreaction — it's looking after yourself.

Common Causes of Ongoing Diarrhoea

Gut conditions

Recurring diarrhoea often relates to irritable bowel syndrome (IBS). The diarrhoea-predominant type (BS-D) is essentially over-sensitive and over-reactive, and the close two-way link between the gut and the brain means stress and emotions set off physical symptoms.

If you'd like to understand the different patterns, our guides on the types of IBS and how to know if you have IBS go a bit deeper.

A GP will also want to rule out inflammatory bowel disease (IBD) - an umbrella term for Crohn's disease and ulcerative colitis, conditions where the gut becomes inflamed. Some people suffering describe this as having an angry gut. These are something a doctor considers especially when diarrhoea comes alongside blood in the stool or unexplained weight loss. They're can be manageable with the right care, which is exactly why getting them identified matters.

Coeliac disease (an immune reaction to gluten) and food intolerances such as lactose intolerance are also worth testing for. The key word is testing - these are best confirmed properly rather than self-diagnosed, because cutting out food groups on a hunch can make a later diagnosis harder.

Finally, two treatable causes are: bile acid malabsorption (where the gut doesn't reabsorb bile properly, which can loosen stools) and microscopic colitis (inflammation only visible under a microscope). Both are things a doctor can investigate and help with.

Diet, medication and lifestyle triggers

Sometimes the cause is closer to the everyday than you'd think. Common food triggers include caffeine, alcohol, very fatty or spicy meals, certain high-FODMAP foods, and some artificial sweeteners such as sorbitol, often found in sugar-free gum and sweets.

Medications can play a part too. Some antibiotics or antacids are all known to loosen stools in some people. If your symptoms started around the time you began something new, it's well worth flagging to your GP or pharmacist - but never just stopping a prescribed medicine. 

You might also notice diarrhoea soon after eating. Often this is the gastrocolic reflex - a normal signal where eating prompts the bowel to get moving- which can be stronger and more urgent in some people, particularly those with IBS.

And then there's stress. When you're anxious or under pressure, your nervous system can keep your gut in an overactive, hurried state, which can mean diarrhoea. 

When your gut microbiome is out of balance

Your gut is home to trillions of microbes (known as your gut microbiome). When it gets knocked off balance - for example after a course of antibiotics - digestion can stay unsettled for weeks while things get back to normal.

A diverse, balanced microbiome tends to support more regular, better-formed stools.

The good news is that your gut is adaptable: with the right diet and habits, it can often be supported back towards balance over time. This isn't a magic fix, and it's no substitute for getting persistent symptoms checked. You can also supplement with prebiotics, probiotics and postbiotics to get back on track.

When to See a GP - and How to Settle Your Gut

Here's some things you should always see a doctor about:

• Diarrhoea lasting more than two weeks
• Blood or mucus in your stool
• Unexplained weight loss 
• Diarrhoea that wakes you during the night
• Signs of dehydration (such as feeling very thirsty, dark urine, dizziness or passing little urine)
• A family history of bowel cancer or inflammatory bowel disease

None of these mean the worst - but asking for help is sensible. A GP can run straightforward tests, including stool samples, blood tests and a coeliac screen, to get to the bottom of what's going on. 

Practical steps that can help

Alongside getting checked, there's plenty you can do day to day to support a calmer gut. Think small, sustainable changes rather than rigid rules.

Stay hydrated. Because diarrhoea drains fluid, drinking enough is the priority - and if you've been losing a lot, oral rehydration salts (or an electrolyte option like Water Wealth) can help replace what's lost.

Ease off the obvious triggers. Gently reducing caffeine and alcohol is often a good first experiment, since both can speed the gut up.

Add soluble fibre, slowly. Soluble fibre - found in oats, psyllium husk and bananas — absorbs water and can add form to loose stools. Build it up gradually and drink plenty of water alongside, as adding too much too fast can backfire.

Keep a food-and-symptom diary. Jotting down what you eat and when symptoms appear is one of the most powerful ways to spot your personal triggers, which are often individual. Pair it with regular, unhurried meals rather than eating on the run.

Look after the bigger picture. Supporting a balanced microbiome through varied, fibre-rich foods, and tending to the basics of stress management — decent sleep, gentle movement, a few minutes of slow breathing — all help create the conditions for a steadier gut. For inspiration on what to eat, see our guide to the best foods for gut health.

Consider gut supplements - Food supplements with proven biotics can help get you back on track. Choose one that suits your lifestyle and have scientific backing to know you're choosing a trusted brand for your gut. 

You Don't Have to Just Live With Constant Diarrhoea

Constant diarrhoea is common, it usually has an identifiable cause and can often be managed. It often responds well to changes and support - and there are clear red flags that tell you when it's time to see a GP. Understanding what's behind your symptoms is genuinely the route to relief, and you don't have to keep arranging your life around the nearest bathroom.

Be patient and kind with yourself as you work it out. Small, consistent steps tend to add up to far more than any dramatic overhaul.

Take our Gut Match to help you choose the right support for you. 

Read how our customer Rhiannon describes Gut Wealth as life changing after years of diarrhoea.