This is a second edition of Acute Abdominal Pain. The abdominal pain is one of the most common symptom that requires immediate medical or surgical attention in Accident and Emergency. In England, there are annually around 600,000 emergency admissions with abdominal pain under the care of general surgeons and the 25 percent of the population report abdominal pain at any one time. This book is a decisional manual booklet for medical students to review this vast, heterogeneous group of patients.