This document provides guidance on evaluating patients presenting with acute abdomen pain. It outlines the importance of a thorough history and physical exam in making a diagnosis. Key aspects of the history include characteristics of the pain, associated symptoms, past medical history, and medications. The physical exam focuses on vital signs, inspection, palpation, and specific tests to locate the source of pain. Recommended basic tests include blood tests, urine analysis, chest x-ray, and ultrasound. Further imaging like CT scans may be needed in some cases. A systematic approach combining history, exam and selective tests usually leads to the correct diagnosis.