- Impaired fluid drainage: A blockage or anatomic variation in the inner ear's drainage system.
- Immune and viral factors: An abnormal immune response or prior viral infection of the inner ear may play a role.
- Genetics: The condition sometimes runs in families.
- Episodes of vertigo: A spinning sensation lasting from about 20 minutes up to 12 hours, often with nausea and vomiting. Some people notice a warning of fullness or louder ringing in the ear minutes before the spinning begins. Learn more about vertigo and its causes.
- Fluctuating hearing loss: Hearing — especially for low-pitched sounds — worsens around attacks and may recover early on, but can become permanent over years.
- Tinnitus: Roaring, buzzing, or ringing in the affected ear; see our page on tinnitus.
- Aural fullness: A sensation of pressure or blockage in the ear, often building before an attack.
- During an attack: Vestibular suppressants such as meclizine and anti-nausea medications such as promethazine ease vertigo and vomiting. Sit or lie still, and do not drive until the episode fully passes.
- Prevention: A consistent low-salt diet is the cornerstone; limiting caffeine and alcohol also helps many patients. A diuretic (water pill) is often added to reduce inner-ear fluid pressure, and keeping salt intake steady through the day matters as much as keeping it low.
- Vestibular rehabilitation: Balance-retraining exercises improve steadiness between attacks.
- Procedures for refractory cases: When attacks persist despite medical therapy, ear specialists can offer injections into the middle ear or, rarely, surgery.
- Hearing support: A hearing aid helps when hearing loss becomes fixed.