Pain assessment is a crucial component of effective pain management in various clinical settings.The goal of this review of the literature is to look at and evaluate the methods for measuring pain that are most frequently employed in various medical specialties.The review focuses on the criterion for selection, psychometric characteristics, and clinical applicability of the identified pain assessment tools.The most often used instruments in both research and clinical practice are the Face Rating Scale, Visual Analogue Scale, and Numeric Rating Scale, according to findings from the literature.The psychometric properties of these tools were assessed in terms of reliability, validity, responsiveness, and clinical utility.This study emphasises the significance of choosing the right pain assessment instruments based on the particular environment, patient group, and desired outcome measurements.For effective pain assessment and management, which enhances patient outcomes and overall quality of care, healthcare providers must have a thorough awareness of the advantages and disadvantages of these tools.