Getadoc
Gastroenterologist Medically reviewed

Understanding the Causes of IBS: A Comprehensive Look

Reviewed by Getadoc Team5 min read Updated 3 July 2026
In this article
Irritable Bowel Syndrome, commonly known as IBS, is a common disorder affecting the digestive system. Its symptoms can range from the stomach making loud gurgling noises and diarrhoea to more subtle signs such as weight loss. But what causes IBS? While the exact causes remain elusive, current medical understanding points to a combination of factors. Let's delve deeper. 

1. Gut Sensitivity and the Nervous System

One of the primary causes of IBS is heightened gut sensitivity. The nervous system plays a crucial role in this. Our gut and nervous systems communicate constantly. For some people with IBS. While not everyone will react to the same foods, keeping a food diary can help identify personal triggers. 

2. Food and Dietary Triggers

Certain foods are notorious for exacerbating IBS symptoms. Notably, many dairy products can be challenging to digest for people with IBS. While not everyone will react to the same foods, keeping a food diary can help identify personal triggers. 

3. Mental Health Conditions

There's a notable link between IBS and certain mental health conditions like anxiety and depression. Stress, for instance, can directly impact the digestive system. As such, individuals with IBS must monitor their mental health. 

4. Infections and Gut Bacteria

Some people develop IBS after a severe bout of diarrhoea caused by a virus or bacteria. It's believed that this might alter the gut bacteria balance, leading to IBS. 

5. Genetics and Family History

There's evidence to suggest that IBS might run in families. If close relatives have the syndrome, you may be at a heightened risk, indicating a possible genetic component. 

6. Other Factors

Inflammatory bowel disease, certain medications, and hormonal changes (especially in women) can also contribute to IBS. However, getting a blood test and discussing symptoms with a healthcare provider is crucial to rule out other conditions.

Recommendations for Managing IBS

Consulting with a healthcare provider is essential if you believe you have IBS. They might recommend a blood test to rule out other conditions. Once diagnosed, IBS supplements can offer relief for some people. Lifestyle changes, including dietary adjustments and stress management, can make a significant difference.  Managing IBS is often a process of understanding personal triggers and finding ways to mitigate them. It might mean excluding certain foods from your diet, incorporating specific IBS supplements, or seeking therapy for mental health conditions that may exacerbate the syndrome.  However, IBS doesn't have to control your life. With the proper support, many people can lead entire, active lives despite their diagnosis.  For a deeper understanding of IBS, its implications, and its management methods. Click here to read more References Smith, T. J. & Talley, N. J. (2019). Sensitivity in the gut and nervous system communication. Journal of Gastrointestinal Research.  Thompson, W. G. & Heaton, K. W. (2018). Dietary triggers in IBS—nutrition Reviews.  Lee, C. & Doo, E. (2020). Mental health conditions and IBS. Psychological Medicine.  Harris, L. A. & Baffy, N. (2017). Gut bacteria and IBS. Gut Microbes.  Lin, L. & Zhang, L. (2019). Genetic components in IBS. Genetic Medicine.  Clarke, G. & Quigley, E. M. M. (2016). Inflammatory bowel disease and IBS. Journal of Inflammation. 

What is IBS? Irritable Bowel Syndrome (IBS) is a common disorder affecting the digestive system, causing symptoms such as the stomach making loud gurgling noises, diarrhoea, pain, and irregular bowel movement. What foods might trigger IBS symptoms? Certain foods, especially many dairy products, can exacerbate IBS symptoms. It's essential to identify personal triggers, which can vary among individuals. How is mental health related to IBS? There's a link between IBS and mental health conditions like anxiety and depression. Stress can directly impact the digestive system, exacerbating IBS symptoms. Can genetics play a role in IBS? Yes, there's evidence suggesting that IBS might have a genetic component, with the syndrome potentially running in families. What are some management strategies for IBS? Management might include dietary adjustments, IBS supplements, stress management, and consulting with a healthcare provider.

Found this helpful? Share it

Keep reading

More from the health library

Medically reviewed

Understanding the Causes of IBS

Explore the causes of IBS (Irritable Bowel Syndrome) in our comprehensive guide. Understand triggers, symptoms, and effective coping strategies for a healthier life.

19 min read

Medically reviewed

Unravelling the Colon Cancer Causes

Learn about the colon cancer causes with our comprehensive guide. Discover risk factors, prevention tips, and why early detection is key for South Africans.

7 min read

Browse all articles

Find care

Gastroenterologists on Getadoc

Registered gastroenterologists with practitioner profiles, contact details and patient reviews.