What Causes Hyperacusis?

History Of Ear Infections

If an individual has a history of ear infections, they might be more susceptible to developing hyperacusis. The most commonly linked infections are viral conditions that affect the facial nerve or inner ear. Viral ear infections usually affect the middle ear, but there's not sufficient research regarding whether middle ear infections increase a person's risk of developing hyperacusis. When the inner ear is affected, the infection might cause patients to lose their balance. An infection-related condition called Bell's palsy also raises an individual's risk of hyperacusis. When not caused by viral infections, Bell's palsy is attributed to trauma to the facial nerve. The condition causes the muscles on one side of an individual's face to droop or stiffen. Bell's palsy sometimes occurs while a patient is recovering from a viral ear infection.

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