To explore the predictive value of alarm signs ("red flags") for a diagnosis of functional gastrointestinal disorders (FGID) in children.

To assess the natural history of pain predominant functional gastrointestinal disorders (FGID) in newly diagnosed pediatric patients.

To document the benefit of various treatment regimens currently employed in managing FGID.

To assess the short- and long-term impact of various FGID regimens.

To allow physicians to gain a better understanding of the epidemiology of FGID.

Hypothesis:

There are presenting symptoms or results from diagnostic tests that are more likely to associated with conditions different from FAP or IBS.

Symptoms of children with FAP/IBS change overtime regardless of the treatments used.

Inclusion Criteria:

• Males and females ages 4 through 16 years of age (up to the day of the 17th birthday)
• Presenting with chronic or intermittent abdominal pain of any severity lasting at least 2 months may participate in the Registry.

Exclusion Criteria:

• Subjects age 10 and above will be asked to complete the questionnaire themselves. Those unable to complete the questionnaire (with only some help) should not be enrolled.
• Patients unable to participate in the program for at least 3 years should not be enrolled (i.e., anticipated move, etc.)

Patients ages 4 through 16 years of age (up to the day of the 17th birthday) will be recruited from the Nationwide Children's Hospital Gastrointestinal Department that are presenting with chronic or intermittent abdominal pain of any severity lasting at least 2 months.