The term for the fear of the dark is "nyctophobia" or "scotophobia." This is a common phobia that affects many people, especially children. Nyctophobia can manifest as heightened anxiety or panic when exposed to dark environments. Those suffering from this fear may experience symptoms such as rapid heartbeat, sweating, or a strong desire to escape. The fear often stems from a psychological response to the unknown, where darkness can conceal threats or dangers. Treatments for nyctophobia may include cognitive-behavioral therapy and exposure therapy, which help individuals manage and overcome their fear through gradual desensitization.