What Is Irritable Bowel Syndrome?
Irritable bowel syndrome (IBS) is a chronic digestive condition that interferes with the normal functions of the
colon. It is characterized by a group of symptoms, namely crampy abdominal (stomach) pain, bloating,
constipation, and
diarrhea.
IBS affects up to 20 percent of the population, making it one of the most common conditions diagnosed by healthcare providers. It is also the second most common reason that people miss work (behind the
common cold).
Irritable bowel syndrome affects people of all ages -- even children
(see Irritable Bowel Syndrome in Children). Women are usually affected two to three times more often than men. Symptoms often appear around age 20.
The exact cause of irritable bowel syndrome is not known. Scientists continue to study genetics, the environment, and the immune system looking for answers.