This document discusses diseases of the inner ear, including tinnitus, vertigo, and Meniere's disease. It defines tinnitus as a noise or ringing in the ear, and describes the causes and types of both subjective and objective tinnitus. Vertigo is defined as a disturbance in equilibrium that causes feelings of rotation or surroundings moving. The mechanisms, types, causes categorized by VERTI, and treatments for vertigo are outlined. Meniere's disease is characterized by the triad of vertigo, deafness, and tinnitus, and is caused by endolymphatic hydrops, which leads to distension of the inner ear. The clinical features, investigations, and medical and surgical treatments for