Diagnosis
The diagnostic criteria as of 2015 define definite MD and probable MD as:
Definite
Two or more spontaneous episodes of vertigo, each lasting 20 minutes to 12 hours
Audiometrically documented low- to medium-frequency sensorineural hearing loss in the affected ear on at least one occasion before, during, or after one of the episodes of vertigo
Fluctuating aural symptoms (hearing, tinnitus, or fullness) in the affected ear
Not better accounted for by another vestibular diagnosisProbable

Two or more episodes of vertigo or dizziness, each lasting 20 minutes to 24 hours
Fluctuating aural symptoms (hearing, tinnitus, or fullness) in the reported ear
Not better accounted for by another vestibular diagnosis
A common and important symptom of MD is hypersensitivity to sounds. This hypersensitivity is easily diagnosed by measuring the loudness discomfort levels (LDLs).Symptoms of MD overlap with migraine-associated vertigo (MAV) in many ways, but when hearing loss develops in MAV, it is usually in both ears, and this is rare in MD, and hearing loss generally does not progress in MAV as it does in MD.People who have had a transient ischemic attack (TIA) or stroke can present with symptoms similar to MD, and in people at risk magnetic resonance imaging  should be conducted to exclude TIA or stroke.Other vestibular conditions that should be excluded include vestibular paroxysmia, recurrent unilateral vestibulopathy, vestibular schwannoma, or a tumor of the endolymphatic sac. Management
No cure for Ménières disease is known, but medications, diet, physical therapy, and counseling, and some surgical approaches can be used to manage it.
EH, in turn, is strongly associated with developing MD, but not everyone with EH develops MD: "The relationship between endolymphatic hydrops and Menieres disease is not a simple, ideal correlation. "Additionally, in fully developed MD, the balance system (vestibular system) and the hearing system (cochlea) of the inner ear are affected, but some cases occur where EH affects only one of the two systems enough to cause symptoms. The corresponding subtypes of MD are called vestibular MD, showing symptoms of vertigo, and cochlear MD, showing symptoms of hearing loss and tinnitus.The mechanism of MD is not fully explained by EH, but fully developed EH may mechanically and chemically interfere with the sensory cells for balance and hearing, which can lead to temporary dysfunction and even to death of the sensory cells, which in turn can cause the typical symptoms of MD – vertigo, hearing loss, and tinnitus.