Irritable bowel syndrome (IBS) affects an estimated 5–10% of people worldwide, and it’s diagnosed more often in women than men. It’s not dangerous, but it can significantly affect quality of life — and many women spend years being told their symptoms are “just stress.”
What IBS is
IBS is a disorder of gut–brain interaction. The gut looks normal on tests, but the way it moves and the way it signals pain to the brain are altered. Symptoms include:
- Abdominal pain, often related to bowel movements
- Bloating and distension
- Changes in stool frequency or form
Doctors classify IBS by the main stool pattern: IBS-C (constipation), IBS-D (diarrhoea) or IBS-M (mixed).
Why women are affected more
Several factors seem to play a part:
- Hormones. Many women notice symptoms worsen around their period, when estrogen and progesterone shift. Symptoms often change through perimenopause too.
- Pain processing. Women on average have greater sensitivity to visceral (internal organ) pain signals.
- Stress and history. Stressful life events, anxiety, and past gastrointestinal infections are associated with IBS onset.
How it’s diagnosed
There’s no single test. Diagnosis is based on symptom patterns (the Rome criteria) and ruling out other conditions. Depending on your symptoms, age and family history, your clinician may check for:
- Celiac disease (a blood test)
- Inflammatory bowel disease (often a stool test for calprotectin)
- Thyroid problems and anaemia
- Bowel cancer, particularly if you’re over 45 or have warning signs
Warning signs that need prompt investigation include rectal bleeding, unexplained weight loss, iron-deficiency anaemia, symptoms that wake you at night, new symptoms after age 50, and a family history of bowel cancer, celiac disease or inflammatory bowel disease. In women over 50, new persistent bloating should prompt consideration of ovarian cancer.
Treatments with good evidence
Diet
- Soluble fiber such as psyllium helps many people with IBS, especially IBS-C. Insoluble fiber (bran) often makes bloating worse.
- The low FODMAP diet, developed at Monash University, reduces fermentable carbohydrates found in foods like wheat, onions, garlic, beans and some fruits. Studies show it improves symptoms in a majority of people with IBS. It’s a three-stage process — restriction, reintroduction and personalisation — ideally guided by a dietitian, because staying highly restrictive long-term isn’t necessary or healthy.
- Regular meals, eaten slowly, and limiting fatty food, caffeine and alcohol can help some people.
Gut–brain therapies
- Cognitive behavioral therapy (CBT) for IBS and gut-directed hypnotherapy have strong evidence, with effects that often last long after treatment ends. They work on the gut–brain signalling that drives symptoms — not because symptoms are “all in your head”.
Medications
Depending on your subtype, options may include laxatives or secretagogues for constipation, antidiarrhoeals, antispasmodics for cramping, and low-dose antidepressants, which act as gut pain modulators even when mood isn’t the issue.
Probiotics
Some strains help some people, particularly with bloating, but results are inconsistent. A four-week trial of a single product, then stopping if nothing changes, is a reasonable approach.
Movement
Regular physical activity improves symptoms for many people with IBS.
Living with IBS
IBS tends to come and go. Keeping a simple diary of food, stress, sleep, menstrual cycle and symptoms can reveal your personal patterns. Most people find a combination of approaches works better than any single one.
If you’ve been told your symptoms are “just stress”, it’s worth knowing that IBS is a recognised condition with effective, evidence-based treatments — and it’s reasonable to ask for them.