IBS and Stress: Why Your Gut Can Feel So Sensitive
Taking the irritable out of IBS
If you live with IBS, you probably know how unpredictable it can be. Some days your gut feels settled. On others it becomes uncomfortable or reactive, and there's no obvious reason why. That inconsistency can be frustrating, especially when you're trying to work out what's driving your symptoms.
You're not alone in this. IBS is estimated to affect somewhere between 1 in 10 and 1 in 7 people worldwide (1,2). IBS is a real, recognised condition, classified as a disorder of gut-brain interaction. (3) Your symptoms are physical, and there is a lot we can understand about why they happen.
The Gut-Brain Axis
Your gut and brain are in constant two-way communication through the gut-brain axis. This is why stress can influence digestion, change how quickly food moves through the gut, and make the gut more sensitive. It's also why symptoms often show up around times of pressure, big changes, or even anticipation, like worrying about eating out or travelling.
It's worth being clear: stress doesn't cause IBS. It can, however, turn the volume up on symptoms that are already there.
Understanding Visceral Hypersensitivity
One common feature of IBS is visceral hypersensitivity, meaning the nerves in the gut are more sensitive than usual. Normal digestive activity, such as gas, stretching, or food moving through the intestines, can feel stronger or more uncomfortable than it would for someone without IBS.
These sensations are real. They're just being processed by a more sensitive system, which can feel especially confusing and isolating when medical tests come back normal. Normal results don't mean nothing is happening. They mean other conditions have been ruled out, which is useful information.
How Stress Can Influence Gut Symptoms
When your body is under stress, it shifts into a protective state, and digestion takes a back seat. This can change gut motility and make sensations feel more intense.
It can also create a loop. Noticing discomfort draws your attention to your gut, which can keep your nervous system on alert, which can make sensations feel louder still. For example, a twinge at work leads to checking in with your body, which raises tension, which makes your gut more reactive.
This loop is a normal response from a nervous system trying to protect you, not a personal failing. Once you can recognise it, you have more room to respond to it.
A Whole-Person Approach to IBS
Food can play an important role in managing IBS, but it's only one part of the picture. A broader approach also looks at your nervous system, your daily routines, and the context of your life.
Gut Health Dietetics
Support might include:
• Finding ways to regulate stress that suit your nervous system
• Noticing how your body responds in different situations
• Easing worry and tension around symptoms
• Building routines that feel safe and predictable
In practice, this might look like:
• Slowing down at meals to support your body's rest-and-digest state
• Diaphragmatic (belly) breathing or another calming technique that works for you
• A simple symptom, food, and stress diary to spot patterns over time
• A gentle walk after meals, if that feels good for your body
What helps will look different for everyone. Sensory sensitivities, anxiety, and neurodivergence can all shape how gut sensations are felt, and strategies like grounding or mindful eating may need adapting. If a common suggestion doesn't work for you, that's useful information, not a failure.
Where a Dietitian Fits In
An IBS dietitian (4) can help you: Dietitian IBS specialist
• Work out which foods are, and aren't, contributing to your symptoms
• Use approaches like the low FODMAP diet safely, in the right phases, without unnecessary long-term restriction
• Rebuild confidence and flexibility with food, especially if fear of symptoms has made eating stressful
• Put together a plan that fits your life, culture, and preferences
When to See Your GP
IBS is diagnosed (5) after other conditions have been considered, so it's important to get new or changing symptoms checked. See your GP if you notice:
• Unexplained weight loss
• Blood in your stools
• Persistent vomiting
• Symptoms that wake you at night
• New symptoms starting after age 50
• A family history of bowel cancer, coeliac disease, or inflammatory bowel disease
A Sensitive Gut Needs the Right Kind of Support
A sensitive gut isn't a broken one. It's a system responding more strongly than it needs to, and with support that looks at both the physical and nervous system sides of IBS, many people find their symptoms become easier to understand and manage over time. A dietitian can help by exploring your current symptoms, diet, and can discuss options for reducing your symptoms with you. For some people this is a FODMAP light approach, for others a low FODMAP diet, followed by reintroduction to identify trigger foods, and for others the Nerva program (a six-week program focused on the gut brain axis) results in an improvement in symptoms.
If you'd like help that brings food, stress, and your own patterns together, book a free 15-minute, discovery call with one of our Accredited Practising Dietitians. We'll briefly chat about your symptoms, answer your questions, and talk through whether our support is a good fit
Dietetic Gut clinic
References
2. Sperber AD, et al. Worldwide prevalence and burden of functional gastrointestinal disorders, Rome Foundation Global Study. Gastroenterology 2021;160:99-114.
3. Drossman DA, Hasler WL. Rome IV: Functional GI disorders: disorders of gut-brain interaction. Gastroenterology 2016;150:1257-61.
4. Morrison S, Talley NJ. Diagnosis and management of irritable bowel syndrome. Australian Prescriber 2026
5. Lacy BE, Mearin F, Chang L, et al. Bowel disorders. Gastroenterology 2016;150:1393-1407
