Benign paroxysmal positional vertigo (BPPV) may be caused by tiny otolyth crystals which break free and float inside the inner ear's semicircular canals, causing dizziness. A doctor may conduct the Dix-Hallpike maneuver to diagnose or rule out this condition. Uncontrollable eye movement, called nystagmus, is another indicator. Radiology may also be warranted to rule out other causes of vertigo.
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