Physicians use several methods for detecting and diagnosing digestive and stomach disorders. A complete physical examination, and sometimes, a psychological evaluation, help the physician determine the need for any further testing. Endoscopy uses a flexible viewing to examine internal structures such as the stomach, the esophagus, and part of the small intestine. Doctors may also suggest X-rays, MRIs, CAT scans and ultrasounds. Reflux-related and acid-related testing allow the physician to determine the cause of recurring indigestion, acid-reflux issues, or more serious gastrointestinal problems.

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