Background: The first appendectomy was performed in 1880 for the case of acute appendicitis in England. No perfect diagnostic evaluation tool exists if symptoms are vague in nature. There are multiple diagnostic approaches which include symptomatology, physical examinations, laboratory findings and imaging studies such as Ultrasonography (USG), Computerised Tomography (CT) of abdomen. Scoring system is a method which helps in estimating the probability of having the corresponding disease in a patient. Such scoring system is of a simple design and easy to implement. One of the system is Alvarado scoring system which is simple enough to apply and it is effective. This system lacks in certain aspects, it doesn’t include C - reactive protein (CRP) as a variable. Appendicitis Inflammatory Response Score (AIRS) was introduced recently which was prepared in the view of the drawbacks in the Alvarado score, includes the CRP value in it.This score can help in diagnosing appendicitis in the suspected patients who require timely surgery or those who are in need of further evaluation