This document provides an overview of otitis media, including its different types and stages, associated clinical features, investigations, and treatment approaches. It discusses acute suppurative otitis media and its typical stages of tubal occlusion, presuppuration, suppuration, resolution, and potential complications. It also covers otitis media with effusion, chronic suppurative otitis media including its tubotympanic and atticoantral types, complications of suppurative otitis media involving the temporal bone and intracranial regions, and adhesive otitis media.