Irritable Bowel Syndrome - Symptoms, Causes & Treatment
Irritable Bowel Syndrome (IBS) is a common functional gastrointestinal disorder characterized by abdominal pain, bloating, and changes in bowel habits (diarrhea, constipation, or both).
Overview
IBS affects approximately 10-15% of the global population and about 4-5% of the Indian population. It is more common in women and people under 50.
IBS is a functional disorder — meaning the digestive system looks normal but does not work properly. While it can be uncomfortable and frustrating, IBS does not cause permanent damage to the intestines or increase cancer risk.
Symptoms of Irritable Bowel Syndrome
- Abdominal PainPrimary
Abdominal pain is discomfort felt anywhere between the chest and groin. It can range from a dull ache to sharp, severe pain and can have many causes.
- BloatingPrimary
Bloating is a feeling of fullness, tightness, or swelling in the abdomen, often accompanied by gas and discomfort.
- ConstipationPrimary
Constipation is a condition characterized by infrequent bowel movements (fewer than three per week), hard or lumpy stools, and difficulty or straining during defecation.
- DiarrheaPrimary
Diarrhea is characterized by loose, watery stools occurring more frequently than usual. It can be acute (lasting 1-2 days) or chronic (lasting more than 4 weeks).
- Nausea
Nausea is an uneasy feeling in the stomach that often comes before vomiting. It can be caused by many conditions including infections, pregnancy, motion sickness, and digestive disorders.
- Fatigue
Fatigue is a feeling of persistent tiredness or exhaustion that does not improve with rest. It can be physical, mental, or both, and may indicate an underlying health condition.
Causes of Irritable Bowel Syndrome
Abnormal muscle contractions in the intestines
Nervous system abnormalities (gut-brain axis dysfunction)
Post-infectious changes after severe gastroenteritis
Changes in gut microbiome
Food intolerances
Stress and mental health conditions
Hormonal changes
Treatment for Irritable Bowel Syndrome
Dietary modifications (low-FODMAP diet)
Fiber supplements
Antispasmodics (mebeverine, dicyclomine)
Anti-diarrheal medications (loperamide)
Laxatives for constipation-predominant IBS
Probiotics
Antidepressants (low-dose TCAs or SSRIs)
Cognitive behavioral therapy
Stress management
Prevention
Follow a balanced, regular eating schedule
Identify and avoid trigger foods
Exercise regularly
Manage stress through relaxation techniques
Get adequate sleep
Stay hydrated
Limit caffeine, alcohol, and carbonated drinks
Risk Factors
Female sex
Age under 50
Family history of IBS
History of physical or sexual abuse
Anxiety, depression, or other mental health conditions
Previous gastrointestinal infection
Food intolerances
When to See a Doctor
See a gastroenterologist if you have persistent changes in bowel habits, abdominal pain that disrupts daily life, unexplained weight loss, blood in stool, symptoms starting after age 50, or worsening symptoms despite treatment.
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Which Doctor to Consult for Irritable Bowel Syndrome
If you are experiencing symptoms of irritable bowel syndrome, you may want to consult a specialist in one of these areas:
Related Conditions
These conditions share similar symptoms with irritable bowel syndrome and may be relevant:
Typhoid
Typhoid fever is a bacterial infection caused by Salmonella typhi, spread through contaminated food and water, causing prolonged fever, weakness, and digestive problems.
Gastritis
Gastritis is inflammation of the stomach lining that can cause nausea, vomiting, abdominal pain, and a feeling of fullness in the upper abdomen.
Fatty Liver Disease
Fatty liver disease (hepatic steatosis) is a condition where excess fat builds up in the liver. It can be alcohol-related or non-alcoholic (NAFLD/NASH).
Malaria
Malaria is a life-threatening mosquito-borne disease caused by Plasmodium parasites, transmitted through the bite of infected Anopheles mosquitoes.
Hypothyroidism
Hypothyroidism is a condition where the thyroid gland does not produce enough thyroid hormones, leading to a slowdown of the body's metabolic processes.
Hyperthyroidism
Hyperthyroidism is a condition where the thyroid gland produces too much thyroid hormone, causing the body's metabolism to speed up significantly.
FAQS
Irritable Bowel Syndrome FAQs
Common questions about irritable bowel syndrome.
The low-FODMAP diet limits fermentable carbohydrates (oligosaccharides, disaccharides, monosaccharides, and polyols) that can trigger IBS symptoms. It involves an elimination phase followed by gradual reintroduction to identify specific triggers.
Stress does not cause IBS directly, but it is a major trigger for symptom flare-ups. The gut-brain connection means stress and anxiety can worsen intestinal motility, sensitivity, and inflammation. Stress management is a key part of IBS treatment.
Medical Disclaimer
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