Acrophobia is an intense, irrational fear of heights that goes far beyond ordinary nervousness. Someone with acrophobia might feel dizzy, start sweating, or even freeze with terror on a ladder just a few feet off the ground. They might avoid tall buildings, bridges, or balconies entirely because the fear feels overwhelming.

The word comes from Greek: acro means “peak” or “summit,” and phobia means “fear.” Like other phobias, acrophobia isn't something people can simply control by deciding not to be scared. The fear feels very real and powerful, even when the person knows logically that they're safe.

Most people feel at least a little cautious around heights, which is actually useful because it keeps us from taking dangerous risks. But acrophobia goes far beyond normal caution. While your friend might enjoy looking out from the top floor of a skyscraper, someone with acrophobia might not even be able to ride an escalator without intense anxiety. People with severe acrophobia can work with therapists, who help them gradually become more comfortable around heights through careful, supported practice.