Acrophobia (from Greek ἄκρος, meaning "summit") is an extreme or irrational fear of heights. It belongs to a category of specific phobias, called space and motion discomfort that share both similar etiology and options for treatment.
Acrophobia can be dangerous, as sufferers can experience a panic attack in a high place and become too agitated to get themselves down safely.
"Vertigo" is often used, incorrectly, to describe the fear of heights, but it is more accurately described as a spinning sensation, which may be caused by looking down from a high place, as well as by some other stimuli. Vertigo is qualified as height vertigo when referring to dizziness triggered by heights.
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