There are risks to cochlear implant surgery, including facial paralysis, meningitis, cerebrospinal fluid leaks, and perilymph fluid leaks in the inner ear. Infection of the insertion site is also possible. People with cochlear implants may experience dizziness, tinnitus, taste disturbances, or numbness around the ear. If the body rejects the implant, local inflammation or reparative granuloma may occur.

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