Functional disorder affecting large intestine. Review possible symptoms, contributing factors, assessment, warning signs and care options.
About Irritable Bowel Syndrome
Functional disorder affecting large intestine
IBS is a common disorder affecting the large intestine, causing cramping, abdominal pain, bloating, and changes in bowel habits.
It is a chronic condition that requires long-term management but does not cause permanent damage to the intestines.
Editorial update (28 September 2026): structured medical content awaits clinical reviewer sign-off.
How assessment may be approached
A clinician may ask about pain, bowel habit, vomiting, bleeding, weight loss, diet, medicines, travel or infection exposure. Examination and selected stool, blood, imaging or endoscopy tests may be considered.
Care may involve hydration, diet adjustment, treatment of a specific cause, medicine review or specialist assessment. Ask what warning signs would change the plan and when review is needed.
When to seek prompt care
Seek urgent care for vomiting blood, black stools, severe or worsening abdominal pain, persistent vomiting, signs of dehydration, high fever, confusion, severe weakness or unexplained rapid weight loss with other concerning symptoms.
Symptoms
- Abdominal pain and cramping
- Bloating and gas
- Diarrhea or constipation
- Mucus in stool
- Changes in bowel habits
Possible causes
- Muscle contractions in intestine
- Nervous system abnormalities
- Inflammation in intestines
- Severe infection
- Changes in gut microbes
Care and treatment options
- Dietary modifications
- Stress management
- Fiber supplements
- Medications for specific symptoms
- Probiotics
Key points
- Affects 10-15% of population
- More common in women
- Chronic but manageable
- Quality of life can be improved
Preparing for a consultation
- A brief record of bowel habits, vomiting, bleeding and pain timing.
- Foods or medicines that seem associated with symptoms.
- Fluid intake, weight change and recent travel or illness.
- Current medicines, especially pain medicines and anticoagulants.
Questions worth asking
- Is Irritable Bowel Syndrome the most likely explanation for these symptoms, and what alternatives should be checked?
- Which symptoms or findings would require urgent review?
- Are medicines, underlying health problems or lifestyle factors contributing?
- What tests or examinations are needed now, and what can safely wait?
- What treatment or self-care options are reasonable, and when should I be reviewed again?
- What is the expected benefit, limit, cost and follow-up plan for the suggested care?
Related conditions
Related clinicians
Medical information limitations
This page summarizes listed condition information and cannot confirm a diagnosis or choose treatment. Do not start, stop or change prescribed treatment based only on this page.
Common questions
What is Irritable Bowel Syndrome?
Functional disorder affecting large intestine This is general information; the name describes a possible diagnosis or clinical problem, not a personal diagnosis.
How might a clinician assess Irritable Bowel Syndrome?
A clinician may ask about pain, bowel habit, vomiting, bleeding, weight loss, diet, medicines, travel or infection exposure. Examination and selected stool, blood, imaging or endoscopy tests may be considered.
What care may be discussed?
Care options listed include Dietary modifications, Stress management, Fiber supplements, Medications for specific symptoms. Which option is appropriate depends on the confirmed cause, severity, preferences and contraindications.
When should Irritable Bowel Syndrome be checked urgently?
Seek urgent care for vomiting blood, black stools, severe or worsening abdominal pain, persistent vomiting, signs of dehydration, high fever, confusion, severe weakness or unexplained rapid weight loss with other concerning symptoms.
How should I prepare for a consultation?
A brief record of bowel habits, vomiting, bleeding and pain timing. Foods or medicines that seem associated with symptoms. Fluid intake, weight change and recent travel or illness. Current medicines, especially pain medicines and anticoagulants. Bring previous reports and a current medicine list where relevant.
Can this page diagnose or treat the condition?
No. A page about Irritable Bowel Syndrome can help you understand possible features and questions, but it cannot confirm a diagnosis or choose treatment. A qualified clinician should assess your symptoms, history and any test results.
General information only; it is not a diagnosis or a substitute for a qualified clinician’s advice.