What Is Insomnia?

You go to bed tired, expecting sleep to follow.

An hour later, you’re still awake.

For someone else, falling asleep isn’t the problem at all. They drift off easily, then wake at 2:30 in the morning and can’t get back to sleep. Another person sleeps reasonably well until 5 a.m., then finds themselves wide awake two hours earlier than planned.

All of these can be experiences associated with insomnia.

But having a bad night—or even a few bad nights—doesn’t automatically mean you have insomnia. Nearly everyone sleeps poorly sometimes. Stress, travel, illness, pain, alcohol, a late cup of coffee, a noisy bedroom or simply an unusual day can interfere with sleep.

Insomnia is less about one difficult night and more about the pattern around it.

What actually counts as insomnia?

Insomnia involves difficulty sleeping despite having enough opportunity and circumstances to sleep.¹

For some people, the problem is getting to sleep in the first place. For others, it’s staying asleep. Some wake much earlier than they intended and can’t drift off again.

The nighttime problem is only part of the story.

Doctors also want to know what happens the next day. Are you tired? Is it harder to concentrate? Are you irritable? Is poor sleep making work, school, driving or ordinary daily activities more difficult?

That’s an important distinction because waking during the night isn’t necessarily abnormal.

Imagine two people who both wake at 3 a.m.

One turns over, falls asleep again within a few minutes and barely remembers waking the next morning.

The other looks at the clock, realizes it’s 3:07, starts calculating how much sleep is left, and is still awake an hour later. The same thing happens several nights that week, and they’re struggling through the afternoons because of it.

Both woke during the night. Their sleep problems are quite different.

Insomnia doesn’t always mean lying awake at bedtime

This is one of the easiest misconceptions to have about insomnia.

We tend to picture someone staring at the ceiling at midnight, unable to fall asleep. That certainly happens, but insomnia can take other forms.

You may fall asleep quickly and then wake repeatedly.

You may have one long awakening in the middle of the night.

Or you may consistently wake much earlier than you want to.

These experiences are sometimes described as difficulty with sleep onset, sleep maintenance, and early-morning awakening.

That’s why “How many hours did you sleep?” is useful, but incomplete.

Two people could both get six hours of sleep. One slept continuously from midnight until 6 a.m. The other spent eight hours in bed, took an hour to fall asleep and was awake for another hour during the night.

Six hours doesn’t tell the whole story.

A difficult week isn’t necessarily chronic insomnia

Sleep often becomes unsettled when life becomes unsettled.

Maybe you’re starting a new job. Someone in your family is sick. You’re traveling. You’ve moved house. Work is unusually stressful.

It would hardly be surprising if your sleep changed too.

Sometimes the problem settles as the situation settles. That’s different from a sleep problem that continues for months.

Clinically, chronic insomnia generally refers to sleep difficulty occurring at least three nights per week for at least three months, along with daytime consequences, despite having adequate opportunity for sleep.¹

Those numbers are useful for diagnosis, but they aren’t a reason to ignore a problem until a calendar says you’ve reached three months. If poor sleep is significantly affecting your life, it’s reasonable to discuss it with a healthcare professional earlier.

Why does insomnia start?

There isn’t one answer.

Sometimes the trigger is easy to identify: stress, illness, pain, medication, a change in schedule, grief, a new baby or a disruptive sleep environment.

Sometimes several things are happening at once.

And sometimes the thing that started the sleep problem isn’t the same thing that keeps it going.

Suppose you go through a particularly stressful month at work and begin sleeping badly. The project eventually ends, but by then bedtime has changed.

You’re paying attention to sleep in a way you never did before.

The clock becomes more interesting. Tomorrow morning feels more threatening. A perfectly ordinary awakening can suddenly feel like evidence that another terrible night has begun.

Sleep itself has become something you’re thinking about.

That doesn’t mean insomnia is imaginary or that someone can simply “stop worrying” and sleep normally. It means sleep is influenced by more than tiredness alone. Biology, health, behavior, environment, timing and our responses to being awake can all interact.

This becomes particularly important when insomnia persists.

Sometimes something else is disturbing your sleep

Repeated waking isn’t always caused by insomnia.

Pain can wake you. So can reflux, breathing problems, the need to urinate, certain medications, alcohol and other substances.

Your internal body clock matters too. Jet lag and shift work are obvious examples, but sleep timing can become misaligned in less dramatic ways as well.

Other sleep disorders can also produce disrupted nights.

Obstructive sleep apnea, for example, repeatedly interferes with breathing during sleep. Loud snoring, gasping, choking or someone noticing pauses in your breathing are worth discussing with a healthcare professional.²

Restless legs syndrome can produce uncomfortable sensations and an urge to move the legs, particularly while resting or trying to sleep.

The same complaint—”I keep waking up“—can therefore have very different explanations.

That’s one reason The Sleep Record won’t take a number such as “I wake four times every night” and tell you that you have insomnia.

There isn’t enough information in that number.

How is insomnia evaluated?

Usually, the first step isn’t an overnight sleep study.

It’s a conversation.

A healthcare professional may want to know when you go to bed, when you actually try to sleep, roughly how long it takes you to fall asleep, how often you wake, how long those awakenings last, when you finally wake for the day and when you get out of bed.

They’ll also want to know what happens when you’re awake.

How do you feel during the day? Has your concentration changed? Are you sleepy? Is sleep interfering with your work or other activities?

Your medications, caffeine and alcohol use, health conditions, schedule, snoring and other nighttime symptoms may also be relevant.²

You don’t need to remember all of this perfectly.

In fact, that’s one reason sleep diaries are useful.

Your memory of sleep isn’t always the same as your sleep pattern

Think about the last seven nights.

Most of us can’t answer those questions accurately from memory.

We remember particularly miserable nights. Ordinary nights blur together.

Recording sleep for several days gives you something more concrete to work with.

Try the 7-Day Sleep Record

Our 7-Day Sleep Record lets you record when you got into bed, when you tried to sleep, when you think you fell asleep, how much time you spent awake during the night, when you finally woke and when you got out of bed.

After seven nights, you can look at the week rather than judging your sleep from yesterday morning.

The tool doesn’t diagnose insomnia or tell you how much you should sleep.

What about sleep hygiene?

This is where internet sleep advice can become frustrating.

Search for help sleeping and you’ve probably seen some version of this:

These can all be sensible habits. If you’re drinking espresso at 9 p.m. or your neighbor’s floodlight is shining through your bedroom window, those things are worth addressing.

But chronic insomnia isn’t necessarily the result of bad sleep hygiene.

Someone can have a dark bedroom, an expensive mattress, no afternoon caffeine and a carefully constructed bedtime routine—and still have insomnia.

Adding another pillow or perfecting the temperature of the room isn’t necessarily going to solve that.

CBT-I is different from ordinary sleep advice

For persistent insomnia, one of the most important treatments to understand is cognitive behavioral therapy for insomnia, usually shortened to CBT-I.

CBT-I isn’t simply a collection of tips for sleeping better.

It’s a structured treatment that works with behaviors and thought patterns that can contribute to persistent insomnia. Depending on the individual and the program, it can include approaches such as stimulus control, cognitive strategies and carefully managed changes in time spent in bed.

The American Academy of Sleep Medicine recommends multicomponent CBT-I for adults with chronic insomnia.⁴ NHLBI also describes CBT-I as the usual first treatment option for long-term insomnia.³

Some elements of CBT-I—particularly approaches that alter the amount of time someone spends in bed—are more involved than general sleep advice. They shouldn’t be reduced to an online calculator telling everyone with a particular sleep-efficiency number to go to bed later.

We’ll cover the individual components of CBT-I separately.

Does insomnia require medication?

Not necessarily.

Medication can have a role in insomnia treatment, but the right approach depends on the person, the duration and nature of the sleep problem, other medical conditions, other medications and potential risks and benefits.

That’s a conversation to have with a qualified healthcare professional rather than something that can be decided from a sleep score or questionnaire on a website.

We’ll examine prescription sleep medications, over-the-counter products and supplements separately in our Sleep Aids section.

When should you talk to a doctor?

An occasional rough night is one thing. Persistent sleep difficulty that is affecting your life is another.

Consider speaking with a healthcare professional if you’re regularly struggling to sleep, waking without feeling rested, experiencing significant daytime sleepiness, or finding that your sleep problems are interfering with normal activities.

There are also symptoms worth raising specifically because they may point toward another sleep or medical condition.

When to talk to a doctor

Symptoms worth raising with a healthcare professional

• Loud or persistent snoring
• Gasping or choking during sleep
• Someone observing that you stop breathing while asleep
• Significant daytime sleepiness
• An uncomfortable urge to move your legs when resting
• Pain, reflux or another physical symptom that repeatedly wakes you

You don’t have to figure out which sleep disorder explains those symptoms yourself.

That’s what the evaluation is for.

Start with what is actually happening

It’s tempting to start with the label.

Do I have insomnia?

A more useful starting point may be simpler:

What is my sleep actually doing?

Look at several nights instead of one.

You may find that the pattern is different from what you expected.

And whether the next step is changing something straightforward, learning more about insomnia, exploring CBT-I or talking with a healthcare professional, you’ll be starting with better information.