Dizziness: Painless head discomfort with many possible causes including disturbances of vision, the brain, balance (vestibular) system of the inner ear, and gastrointestinal system. Dizziness is a medically indistinct term which laypersons use to describe a variety of conditions ranging from lightheadedness, unsteadiness to vertigo.
Quick GuideBalance Disorders: Vertigo, Motion Sickness, Labyrinthitis, and More
Medically reviewed by Martin Zipser, MD; Board Certified: Surgery
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Last Editorial Review: 5/12/2014