Stomach,Ache,,Cramps,And,Hands,Of,Woman,With,Abdomen,Pain

Understanding Causes of IBS- Relief Through Nutrition and Yoga

Did you know that Irritable Bowel Syndrome (IBS) affects around 10–15% of people worldwide? Despite being common, many struggle to understand what causes IBS symptoms or how to manage them effectively. If you’ve been living with IBS, it can sometimes feel confusing, but by understanding what’s really happening in your gut, you can begin to take back control.

As a nutritionist and yoga teacher, I’ve seen first-hand how small, consistent changes to diet, lifestyle, and stress management can make a huge difference. In this guide, we’ll explore the key causes of IBS, how your gut-brain connection affects digestion, and what you can do to calm and support your body naturally.

What Is IBS?

Irritable Bowel Syndrome is a chronic condition that affects the large intestine and can cause abdominal pain, bloating, excess gas, diarrhoea, constipation, or a mix of both. Causes of IBS as well as symptoms vary greatly from person to person and can come and go depending on stress, hormones, or dietary triggers.

The Different Types of IBS

IBS is often grouped into three main types:

  1. IBS-D (Diarrhoea-predominant): Frequent, loose stools and urgency.
  2. IBS-C (Constipation-predominant): Infrequent bowel movements and harder stools.
  3. IBS-M (Mixed): Alternating between diarrhoea and constipation.

Understanding which type you have can help you make targeted nutrition and lifestyle choices.

Common Triggers and Causes of IBS

1. Diet and Food Intolerances

Food is one of the biggest influencers of IBS symptoms. Some of the most common triggers include:

  • Dairy (especially if you’re lactose intolerant)
  • Gluten or wheat-based foods
  • Highly processed or sugary foods
  • Artificial sweeteners and preservatives

Keeping a food and symptom diary can help you identify which foods are most likely to trigger flare-ups. Many people find relief through a personalised elimination diet, followed by careful reintroduction under guidance.

2. Gut Health and the Microbiome

Your gut microbiome– the community of bacteria living in your intestines, plays a major role in digestion, nutrient absorption, and inflammation. When this balance is disrupted, IBS symptoms often worsen.

To support a healthy gut:

  • Eat a wide variety of plant foods to feed beneficial bacteria
  • Include prebiotic and probiotic foods (such as kefir, sauerkraut, and bananas)
  • Reduce ultra-processed foods that damage gut bacteria

A diverse, fibre-rich diet is one of the most effective long-term ways to support your microbiome and improve digestion, no matter the causes of IBS.

3. Stress, the Nervous System, and the Vagus Nerve

There’s a powerful connection between your gut and brain, known as the gut–brain axis. When you’re under chronic stress, your body’s “fight or flight” mode can disrupt digestion, slow down gut motility, and heighten sensitivity.

Stimulating the vagus nerve– the communication highway between the brain and gut, helps activate your body’s “rest and digest” state. This can calm the digestive system and ease symptoms such as bloating, discomfort, and irregularity.

Simple ways to stimulate the vagus nerve:

  • Slow, deep breathing (especially longer exhales)
  • Yoga and gentle movement, which promote relaxation and gut circulation
  • Meditation or mindfulness, to calm an overactive nervous system
  • Singing, humming, or chanting, all naturally stimulate vagal tone

Regular yoga practice is particularly powerful because it combines movement, breathwork, and mindfulness, helping you reduce stress and restore gut–brain balance.

4. Hormonal Changes

For many women, IBS symptoms fluctuate with hormonal changes, especially around menstruation or menopause. Oestrogen and progesterone influence gut motility and sensitivity, so it’s not uncommon to notice flare-ups at certain times of the month.

Tracking your cycle can reveal useful patterns. Gentle yoga, breathwork, and consistent sleep routines can all help stabilise hormones and promote smoother digestion.

If you’re in perimenopause or menopause, you might find my post on How to Navigate Menopause with Nutrition helpful.

5. Other Contributing Conditions

Sometimes, IBS overlaps with or is mistaken for other conditions such as coeliac disease, inflammatory bowel disease (IBD), or gastro-oesophageal reflux (GERD) (See my blog on Reflux for more information about that condition). It’s essential to work with a healthcare professional to rule out other causes and ensure you receive appropriate support.

How to Manage IBS Naturally

The most effective approach to IBS involves supporting both your digestive health and your nervous system. Combining nutrition, stress management, and mindful movement can help you move from frustration to freedom.

Practical steps to get started:

  • Identify and avoid your key triggers
  • Eat mindfully-chew slowly, eat in a calm setting, and don’t rush meals
  • Practise daily relaxation (yoga, meditation, or slow breathing)
  • Prioritise sleep and gentle movement
  • Stay hydrated and include soluble fibre for bowel regularity

If you’d like to explore these strategies in more depth, book a free discovery call – where we’ll discuss how to support your digestion, reduce IBS symptoms, and calm your gut through food and lifestyle.

Final Thoughts

IBS can be challenging, but it doesn’t have to control your life. By combining smart nutrition, vagus nerve support, and calming practices like yoga, you can start to ease symptoms and rebuild confidence in your body.

The journey to better gut health is gradual, but every small step counts, one mindful breath, one nourishing meal, one calm moment at a time.

Posted in