Risk factors

Many people have occasional signs and symptoms of IBS. But you're more likely to have the syndrome if you:

• Are young. IBS occurs more frequently in people under age 50.
• Are female. In the United States, IBS is more common among women. Estrogen therapy before or after menopause also is a risk factor for IBS.
• Have a family history of IBS. Genes may play a role, as may shared factors in a family's environment or a combination of genes and environment.
• Have anxiety, depression or other mental health issues. A history of sexual, physical or emotional abuse also might be a risk factor.