Irritable bowel syndrome (IBS) is a complex disorder in which the intestines lose their ability to efficiently move their contents.

The main symptoms of IBS are:

Abdominal pain
Bloating
Diarrhea
And/or constipation

Less common symptoms may include:

Headaches
Fatigue
Depression
And anxiety

Symptoms may be triggered by:

Stress
Diet
Emotional factors
Hormone levels
And medications