Labyrinthitis is irritation and swelling of the inner ear. It can cause vertigo and hearing loss.
Labyrinthitis is usually caused by a virus and sometimes by bacteria. Having a cold or flu can trigger the condition. Less often, an ear infection may lead to labyrinthitis. Other causes include allergies or certain drugs that are bad for the inner ear.
Labyrinthitis usually goes away within a few weeks. Treatment can help reduce vertigo and other symptoms.
Source: U.S. National Library of Medicine