Sleep, Actually

Dream-like experiences around sleep

Vivid, sometimes unsettling images or sensations while falling asleep (hypnagogic) or waking (hypnopompic).

Sourced Medical EducationSources cited. No clinician review claimed.Last reviewed August 8, 2026

These are vivid dream-like experiences at the boundary of sleep. Clinicians call the ones occurring while falling asleep hypnagogic, and those on waking hypnopompic.

They can involve seeing, hearing, or feeling things that are not there, and they can feel extremely real — which is exactly why people often do not mention them.

They are recognised and documented in the literature on narcolepsy. Describing them to a clinician is useful information, not an admission of anything.

Definitions on this page

Hypnagogic
Occurring while falling asleep.
Hypnopompic
Occurring while waking up.

Related journal prompts

Optional. Recording what you notice may help you prepare questions for a qualified healthcare professional. NAP never infers a cause from what you write.

  • Anything to note about the edges of sleep today — falling asleep or waking?
Open the Sleep & Nap Journal

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