It manifests itself with periodic vertiginous crises, tinnitus, fullness (feeling of a 'closed' ear) and reduced hearing capacity in the affected ear (fluctuating hearing loss). Generally, the vertiginous crisis manifests itself with objective vertigo, nausea and vomiting. It affects around 0.2 % of the population and is most common between the ages of 20 and 60. The cause of the disease is unknown, but is linked to endolymphatic hydrops with consequent dilatation of the membranous labyrinth that triggers the crisis. The diagnosis of Méniere's disease is clinical, made on the basis of the medical history and the data obtained from the audiometric and otoneurological examination. Other tests such as MRI of the brain are used to rule out other central pathologies. Treatment is essentially medical.