This document provides an overview of case history in endodontics. It defines case history as data about an individual's medical history and family that can be useful for diagnosis or instruction. The purpose of a case history is to obtain necessary information to make an accurate diagnosis. A case history involves collecting general information like name, age, sex, occupation, as well as medical history, extraoral exam, intraoral exam, and diagnosis. Factors like medical conditions, medications, and physical status are important to consider for treatment planning.