Sleep Deprivation: Why It's a Global Problem

Sleep Deprivation: Why It's a Global Problem

Roughly one in three adults in the U.S. gets less than seven hours of sleep on a typical night — a number that hasn't meaningfully moved in over a decade. The CDC has officially called insufficient sleep a public health problem, not a personal failing. That distinction matters, because most people treat their own exhaustion as a scheduling issue to push through rather than a health issue worth solving.

It isn't just an American problem, either. Globally, an estimated 852 million adults live with insomnia — about 16% of all adults on earth. Sleep deprivation is one of the most common, most under-treated health issues in the world, and the cost isn't abstract: chronically insufficient sleep raises the risk of heart disease, stroke, type 2 diabetes, and mortality, and contributes to a meaningful share of fatal car crashes every year.

Why is sleep deprivation so widespread?

There's no single cause — sleep loss usually comes from a handful of overlapping issues, some behavioral and some medical.

Stress and a racing mind. This is the most familiar culprit, and for good reason: sleep researchers report that a large majority of Americans have had sleep disrupted by stress. The relationship runs both directions — stress keeps you up, and not sleeping makes you more stressed, which keeps the cycle going.

Screens, caffeine, and inconsistent schedules. Light exposure before bed, caffeine or alcohol too late in the day, and irregular sleep-wake times all interfere with the body's ability to wind down and stay asleep. These are the most talked-about causes, and often the easiest to address — but they're rarely the whole story.

Underlying medical conditions. This is the piece that gets missed most often. Conditions like restless legs syndrome, chronic pain, thyroid disorders, and menopause-related hormone shifts can all disrupt sleep in ways no amount of “better sleep hygiene” will fix. And one of the most common — and most underdiagnosed — is obstructive sleep apnea (OSA), a condition where breathing repeatedly stops and starts throughout the night.

Could sleep apnea be the real reason you can't sleep?

It's more common than most people realize, and it doesn't just affect people who fit the stereotype of a snoring, overweight, middle-aged man. Sleep apnea affects a significant share of adults, and a large portion of cases go undiagnosed — often for years, because the person assumes they simply have insomnia or are “just a bad sleeper.”

Here's the pattern worth recognizing: if you're sleeping a normal number of hours but still waking up exhausted, if you or a partner have noticed loud snoring or gasping at night, or if you wake up with headaches or a dry mouth, the problem may not be how long you're asleep — it's what's happening while you are. Sleep apnea fragments sleep dozens or even hundreds of times a night, often without you ever fully waking up to notice.

This is also where sleep apnea and insomnia can get tangled together. Some people's brains subconsciously fight against falling into deep sleep to avoid the breathing pauses, which can look and feel exactly like classic insomnia — even though the root cause is airway obstruction, not a racing mind.

What actually helps: oral appliances for sleep apnea

For people whose sleep apnea is confirmed as mild to moderate, one of the most effective and most livable treatments is a custom oral appliance — a small, retainer-like device worn at night that gently holds the jaw forward to keep the airway open. Unlike a CPAP machine, there's no mask, no hose, and nothing to plug in, which is a major reason people are far more likely to actually use it every night — and a treatment only works if you'll actually stick with it.

It isn't guesswork, though. A real diagnosis — through an in-lab or at-home sleep study reviewed by a board-certified sleep doctor — is what determines whether an oral appliance is the right fit, or whether CPAP or another treatment makes more sense for your specific case. Custom-fit devices, built from an impression of your own bite and monitored with a follow-up sleep test, are what separate an effective medical treatment from an over-the-counter mouthguard that just quiets snoring without actually fixing the underlying problem.

What you can actually do about it

If stress, screens, or an inconsistent schedule sound like your main issue, small changes — a consistent wake time, less screen light before bed, cutting back on late caffeine or alcohol — genuinely help, even if they take a few weeks to show results.

But if you've already tried the obvious fixes and you're still waking up tired, or if snoring and breathing pauses are part of the picture, it's worth ruling out sleep apnea before assuming you just have “bad sleep.” That starts with real data, not another sleep hygiene checklist.

At real sleep, you can take an at-home sleep apnea test from your own bed, get your results reviewed by a board-certified sleep doctor, and find out — clearly, with real data — whether a custom oral appliance could be the fix you've been missing.

Take the free two-minute assessment to find out where you stand.