Syndrome de l'intestin irritable (SII)
متلازمة القولون العصبي
A common functional digestive disorder causing abdominal pain, bloating, and altered bowel habits (diarrhea, constipation, or both), without any visible structural damage to the colon — distinct from inflammatory conditions like colitis. Managed through diet, stress management, and, when needed, targeted medication.
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Réponse rapide
Irritable bowel syndrome (IBS) is a common long-term disorder of how the gut works. It causes abdominal pain with changes in bowel habit — diarrhoea, constipation, or both — without visible damage to the bowel.
Symptoms come and go, often triggered by certain foods, stress or hormonal changes. Bloating and wind are common.
IBS is diagnosed from the symptom pattern after excluding other conditions. It is managed with diet and lifestyle changes, stress management and, where needed, medicines. Blood in stools, weight loss, night-time symptoms or symptoms starting after 50 need medical assessment.
Symptômes
Abdominal pain or cramps
Often eased by opening the bowels.
Bloating and a swollen abdomen
Diarrhoea
Constipation
Alternating diarrhoea and constipation
Excess wind
Feeling of incomplete emptying or mucus in stools
Guides des symptômes
Causes et facteurs de risque
Causes
- Gut-brain interaction — The gut may be more sensitive and its movement less regular.
- Changes in gut bacteria or previous gut infection — IBS sometimes begins after a bout of gastroenteritis.
- Stress and mental health — Anxiety and stress often worsen symptoms.
- Food triggers — Certain foods or eating patterns bring on symptoms in some people.
Facteurs de risque
- Age under 50 at onset
- Being female
- Family history of IBS
- Anxiety or depression
- Previous severe gut infection
- Stressful life events
Comment le diagnostic est-il posé ?
There is no single test for IBS. Doctors recognise it from the symptom pattern and use tests mainly to exclude other conditions.
Symptom assessment
Abdominal pain with bowel changes over months, and no warning signs.
Basic blood and stool tests
Blood count, tests for coeliac disease, and inflammation markers in stool or blood help exclude other causes.
Further tests if warning signs are present
Colonoscopy or imaging is considered for blood in stool, weight loss, anaemia, a family history of bowel cancer or onset after age 50.
Traitement
IBS can't be cured, but symptoms can usually be controlled. Treatment is tailored to your main symptoms and chosen with your doctor.
Diet changes
Regular meals, adequate fluids, adjusting fibre, and identifying trigger foods; a structured low-FODMAP diet under a dietitian's guidance helps some people.
Physical activity and sleep
Regular exercise often helps symptoms.
Stress management
Relaxation techniques, and cognitive-behavioural or gut-directed therapies.
Medicines
Depending on symptoms — for pain, diarrhoea or constipation — as advised by a doctor.
Keep a symptom and food diary to help identify triggers before making big dietary restrictions.
Quand consulter un médecin ?
Prévoyez une évaluation médicale si
- Symptoms that are new after the age of 50
- Persistent change in bowel habit
- Symptoms that wake you at night
- A family history of bowel or ovarian cancer
- Symptoms not improving with treatment
Consultez en urgence si
- Blood in the stool or black stools
- Unintentional weight loss
- Persistent vomiting or severe, unrelenting abdominal pain
- Fever with severe diarrhoea
Prévention
Eat regular meals
And take time to eat without rushing.
Keep a food-and-symptom diary
To spot personal triggers.
Stay active
Manage stress and sleep well
Limit known triggers
Such as excess caffeine, alcohol or very fatty foods if they affect you.
Questions fréquentes
What is IBS?
A common long-term condition affecting the gut, causing abdominal pain and bowel changes without visible damage.
What causes IBS?
The exact cause isn't known. Gut sensitivity, gut-brain signalling, gut bacteria, stress and food triggers all seem to play a part.
Is IBS the same as IBD (colitis or Crohn's disease)?
No. IBD involves visible inflammation and damage to the gut; IBS does not, although symptoms can overlap.
Can IBS lead to cancer?
IBS itself is a functional disorder, not a form of tissue damage, but new symptoms — such as bleeding, unintentional weight loss, or a change in bowel habit after age 50 — should always be checked by a doctor rather than assumed to be IBS.
Which foods should I avoid?
Triggers differ between people. A food diary and, where suitable, a supervised low-FODMAP diet can help you identify them.
Can IBS be cured?
No, but for most people symptoms can be controlled with diet, lifestyle and treatment.
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Sources médicales
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