You searched for: “climacophobias
climacophobia (s) (noun), climacophobias (pl)
An excessive fear of stairs, of falling down the stairs, being hurt in a fall, or having anxiety about heights.

Climacophobiacs who have fears of heights emphasize that their visual space is important. They will not be able to go down a flight of stairs if they can see an open stairwell and they are very fearful of looking out of a high window which stretches from the floor to the ceiling, but not if the window's bottom is at or above the waist level.

A person suffering with climacophobia may also be afflicted with other related phobias; such as, bicycles, skiing, certain amusement rides, stairs, tall buildings, and bridges.

The old man has an abnormal fear of walking down the stairs.
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