Irritable Bowel Syndrome (IBS) Basics

Tap a term to see what it means.

What Is IBS

A common chronic disorder affecting the large intestine, characterized by recurring abdominal pain along with changes in bowel habits, without any visible structural damage to the digestive tract.

Common Symptoms

Symptoms typically include abdominal pain or cramping, bloating, and changes in bowel movements — which can involve diarrhea, constipation, or an alternating pattern of both.

IBS Subtypes

IBS is often categorized into subtypes based on the predominant bowel pattern: IBS with diarrhea, IBS with constipation, or a mixed type involving both.

Possible Triggers

Commonly reported triggers include certain foods (such as high-FODMAP foods, dairy, or caffeine), stress, and hormonal changes, though specific triggers vary widely from person to person.

How IBS Is Diagnosed

Because there is no single definitive test for IBS, diagnosis is typically based on symptom patterns over time, along with ruling out other conditions with similar symptoms.

General Management Approaches

Common approaches include identifying and avoiding personal trigger foods, managing stress, regular physical activity, and in some cases dietary changes such as a low-FODMAP diet under professional guidance.

A common but individually variable condition

This page is for general information only and is not a substitute for professional medical diagnosis or treatment. IBS is one of the most commonly diagnosed digestive disorders, but its triggers and severity vary considerably between individuals, which is why management is often a personalized process developed with a healthcare provider.

Frequently Asked Questions

Is IBS the same as inflammatory bowel disease (IBD)?

No — despite the similar name, IBS and IBD (which includes Crohn's disease and ulcerative colitis) are different conditions; IBD involves visible inflammation and tissue damage, while IBS does not.

When should someone with digestive symptoms see a doctor?

Symptoms like unexplained weight loss, blood in stool, persistent severe pain, or symptoms that begin later in life should be evaluated by a doctor promptly, since they can indicate conditions other than IBS.