- Sleeping long enough but still feeling cognitively or physically wrecked
- Unplanned dozing, dangerous driving, or overwhelming daytime fog
- Mornings that feel like waking from anesthesia rather than sleep
What this often includes
Daytime sleepiness can reflect fragmented sleep, untreated breathing disorders, circadian mismatch, narcolepsy spectrum conditions, idiopathic hypersomnia, sleep inertia, medication effects, or long-standing sleep deprivation wearing a medical disguise.
Why it often gets missed
Sleepy patients are frequently told they are burned out, depressed, lazy, or simply not trying hard enough. Sometimes they are given stimulants before anyone has been clear about why the sleepiness exists in the first place.
How evaluation works here
The evaluation looks at actual sleep opportunity, breathing-disorder risk, circadian timing, medications, substance use, cataplexy or REM phenomena, prior studies, and whether testing such as polysomnography or MSLT would meaningfully answer the question.
How treatment may look
Treatment depends on the cause. It may involve fixing the underlying sleep disorder, aligning timing, addressing medications, improving safety, or targeted narcolepsy or hypersomnia treatment when the diagnosis points there.