Meniere's Disease
Ménière’s disease, also called idiopathicendolymphatic hydrops, is a disorder of the inner ear. Although the cause is unknown, it probably results from an abnormality in the fluids of the inner ear. Ménière’s disease is one of the most common causes of dizziness originating in the inner ear. In most cases only one ear is involved, but both ears may be affected in about 15 percent of patients. Ménière’s disease typically starts between the ages of 20 and 50 years. Men and women are affected in equal numbers.
 

Symptoms and Incidence of Ménière's disease

Periodic attacks of vertigo ( the so-called Ménière's "attack") is the most disruptive of the symptoms to the patient. It is usually the vertigo attack which causes the patient to seek medical treatment. Typically, vertigo occurs in the form of a series of attacks over a period of weeks or months, interspersed by periods of remission of variable duration.

What is Meniere's Disease?

Most researchers believe that the symptoms that are called Meniere's Disease in most (but not all) patients are the result of "idiopathic endolymphatic hydrops" -- excess endolymphatic fluid (one of two inner ear fluids) from an unknown ("idiopathic") cause.