Medically reviewed by Dr Usman Naeem, 24 Oct 2026.
Key points
- IBS is diagnosed mostly from your symptom pattern, with a few simple tests to rule out other conditions.
- Triggers vary: certain foods, irregular meals, stress and poor sleep are common.
- Soluble fibre, regular routine, exercise, stress management and targeted medicines help many people.
- Blood in the stool, weight loss, anaemia, or symptoms waking you at night are not typical of IBS and need tests.
Overview
IBS involves a sensitive gut and changes in how the gut and brain communicate. Doctors often use the Rome IV criteria: recurrent abdominal pain on average at least one day a week for three months, linked to bowel movements and a change in how often or how loose or hard the stool is.
IBS is grouped by the main stool pattern: with constipation (IBS-C), with diarrhoea (IBS-D) or mixed (IBS-M). A gut infection can trigger IBS in some people. Symptoms come and go, and many people find one or two triggers that help them manage it.
Causes and risk factors
- Gut sensitivity and altered gut motility
- Previous gastroenteritis (infection)
- Stress, anxiety, low mood and poor sleep
- Certain foods (for example high-FODMAP foods, caffeine, very fatty meals) in some people
Symptoms
- Cramping abdominal pain, often eased or changed by a bowel movement
- Bloating and gas
- Constipation, diarrhoea, or alternating between the two
- Symptoms that flare with stress, certain foods or irregular meals
When to seek urgent medical care
- Blood in the stool, unintended weight loss or anaemia
- Pain or diarrhoea that wakes you from sleep
- A new change in bowel habit after about age 50, or a family history of bowel cancer, coeliac disease or inflammatory bowel disease
In an emergency go to the nearest emergency department or call Rescue 1122.
How it is assessed
- Diagnosis rests mainly on your symptom pattern and examination
- Simple tests (blood count, coeliac blood test, CRP, stool calprotectin when diarrhoea is prominent) are often done to rule out other conditions
- Colonoscopy is considered when there are warning features, or in older patients with new symptoms
Treatment
Diet and lifestyle
- Regular meals, enough fibre of the right type (soluble fibre such as ispaghula often suits better than coarse bran), physical activity, good sleep
- A guided trial of a low-FODMAP diet in selected patients, ideally with a dietitian, as it is restrictive and should be re-expanded after testing
- Stress management, and for some people gut-directed therapies such as cognitive behavioural therapy or hypnotherapy
Medicines
- Chosen for the main symptom: antispasmodics or peppermint oil for pain, loperamide or other medicines for diarrhoea, osmotic laxatives for constipation, and low-dose neuromodulators for persistent pain in some patients
- Some medicines are used only for short periods. Do not use long-term laxatives or antidiarrhoeals without review
What you can do
- Eat at regular times and chew slowly
- Keep a simple food and symptom diary for 2 to 4 weeks to spot your triggers
- Increase fibre gradually to avoid gas
- Exercise, sleep and relaxation help IBS more than most people expect
Common questions
Can IBS turn into cancer or colitis?
No. IBS does not cause bowel cancer or inflammatory bowel disease. But the symptoms overlap with those conditions, which is why warning features are checked before the diagnosis is accepted.
Do I need a colonoscopy?
Not for everyone. It is recommended if you have warning features such as blood in the stool, anaemia, weight loss, a strong family history, or new symptoms at an older age.
Is IBS “all in the mind”?
No. IBS is real and involves the gut and the gut-brain connection. Stress can worsen it, but stress is not the only cause.
اردو خلاصہ
آئی بی ایس میں پیٹ میں درد یا بے آرامی کے ساتھ پاخانے کی عادت بدل جاتی ہے (قبض، دست یا دونوں)۔ یہ تکلیف دہ ہو سکتا ہے مگر آنتوں کو نقصان نہیں پہنچاتا اور کینسر کا سبب نہیں بنتا۔
باقاعدہ وقت پر کھانا، ریشے دار غذا آہستہ آہستہ بڑھانا، ورزش، نیند اور ذہنی دباؤ میں کمی مددگار ہیں۔ پاخانے میں خون، وزن میں کمی، خون کی کمی یا رات کو جگانے والے دست یا درد ہو تو ٹیسٹ کروائیں۔
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This page gives general information prepared for Dr Usman Naeem and is not personal medical advice. See the medical disclaimer.