Sleep, Actually
Excessive daytime sleepiness
Persistent, overwhelming daytime sleep pressure that a normal night's sleep does not reliably resolve.
Excessive daytime sleepiness — often shortened to EDS — is described by NINDS as the most common symptom of narcolepsy: an overwhelming urge to sleep during the day, present regardless of how much sleep was had at night.
People describe it as a mental fog, a loss of focus, or sudden sleep attacks that arrive during activities rather than only during quiet ones.
Because it affects attention, it has practical safety consequences. If you feel unsafely sleepy, do not drive — NHTSA is clear that drowsy driving is dangerous. Stopping is not a failure of willpower.
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.
- When did sleep pressure arrive today, and what was I doing?
- Did resting change anything, and for how long?
Nearby
More in this part of the hub
Cataplexy
A sudden, brief loss of muscle tone while awake, often triggered by strong emotion such as laughter.
Sleep paralysis
A temporary inability to move or speak while falling asleep or waking, usually lasting seconds to a couple of minutes.
Dream-like experiences around sleep
Vivid, sometimes unsettling images or sensations while falling asleep (hypnagogic) or waking (hypnopompic).
Dreaming, Nightmares, and Narcolepsy
Nightmares, dream-like experiences around sleep, sleep paralysis, and dream enactment are related but distinct experiences.
Fragmented nighttime sleep
Frequently broken nights — a common and often surprising part of a condition associated with daytime sleepiness.
Automatic behaviour
Continuing a familiar activity while partly asleep, with little or no memory of it afterwards.