- dizziness
- vertigo
- loss of balance
- nausea and vomiting
- tinnitus, which is characterized by a ringing or buzzing in your ear
- loss of hearing in the high-frequency range in one ear
- difficulty focusing your eyes
- respiratory illnesses, such as bronchitis
- viral infections of the inner ear
- stomach viruses
- herpes viruses
- bacterial infections, including bacterial middle ear infections
- fainting
- convulsions
- slurred speech
- fever
- weakness
- paralysis
- double vision