How Long Is Too Long? When Persistent Insomnia Calls for a Sleep Medicine Consultation

It is 3:14 a.m. and the ceiling has become very familiar. You have tried the podcast, the glass of water, flipping the pillow to the cool side. Tomorrow’s meeting is already playing on a loop. This has been going on for a while now, though you could not say exactly when “a rough patch” turned into “this is just how I sleep.” Somewhere in the middle of that fog sits a practical question: when to see a doctor for insomnia, and whether a visit would even change anything.

The honest answer is that duration matters, but it is not the whole story. Sleep medicine draws a fairly clear line between short-term sleeplessness that usually resolves on its own and a chronic pattern that rarely does. What tips the balance is not only how many nights you have lost, but what those nights are costing you, and whether something else, a breathing problem, a mood disorder, pain, a medicine, is hiding behind the label.

This explainer walks through that line, what a consultation actually involves, and why the treatment specialists reach for first is not a pill.

What counts as insomnia, and what is just a bad week?

Insomnia is not simply “not sleeping much.” Clinically, it means persistent difficulty falling asleep, staying asleep, or waking too early, despite having adequate opportunity to sleep, plus some daytime consequence such as fatigue, irritability, poor concentration, or worry about sleep itself. That second half matters. A person who sleeps six hours, wakes refreshed, and functions well is a short sleeper, not an insomniac. A person who lies awake for two hours nightly and drags through the afternoon meets the definition even if the total hours sound respectable.

The pattern varies. Some people cannot switch off at bedtime, a problem clinicians call sleep-onset insomnia. Others fall asleep easily but surface at 2 or 3 a.m. and cannot return, known as sleep-maintenance insomnia. Many have both, and the pattern can shift over months. Early-morning waking is common alongside depression, while trouble falling asleep often travels with anxiety or an irregular schedule.

Scale is worth stating plainly. Cleveland Clinic notes that roughly one in three adults reports insomnia symptoms at some point, while about one in ten meets the criteria for insomnia disorder. Occasional bad nights are close to universal; the disorder is not.

Most adults need seven to nine hours, according to Mayo Clinic, but that range is a population average, not a personal prescription. The question a clinician asks is less “how many hours?” than “is your sleep unrefreshing, hard to get, and getting in the way of your life?” If yes, and it has lasted more than a few weeks, it has moved past a bad week and deserves attention.

How long is too long? The three-month line most guidelines draw

Sleep medicine sorts insomnia largely by duration. Short-term insomnia lasts days to weeks, typically fewer than three months, and usually has an obvious trigger: a bereavement, a new baby, exam season, jet lag, a stressful job change. Mayo Clinic and the NIH’s National Heart, Lung, and Blood Institute both describe this form as common and often self-limiting. Once the stressor eases, sleep tends to follow.

Chronic insomnia is different. The working definition used by Mayo Clinic and Cleveland Clinic is trouble sleeping at least three nights a week for three months or longer. The number is not arbitrary. By three months, the original trigger has often faded, yet sleep has not recovered. What keeps the problem going is no longer the stressor but a set of learned responses: dread as bedtime approaches, hours in bed lying awake, naps to compensate, caffeine to get through the day. Sleep specialists call these perpetuating factors, and they are the target of treatment.

So is three months the answer to “how long is too long”? As a threshold for the chronic label, yes. As a waiting period before seeking help, no. Nothing in the guidelines suggests enduring twelve weeks of poor sleep before mentioning it to a clinician. The NHS advises seeing a GP when changing sleep habits has not helped and the problem has persisted for months, but also when sleeplessness is affecting daily life.

A useful way to hold both ideas: three months tells the clinician what kind of insomnia this is. Your daytime function tells you when to book the appointment. When the two disagree, function wins.

When to see a doctor for insomnia before the three months are up

Several situations warrant an earlier visit regardless of how many weeks have passed. Each points to a cause that will not fix itself with better habits, or to a consequence too serious to ride out.

Daytime impairment is the first. If you have drifted at the wheel, made errors at work that frighten you, or found your temper fraying in ways that strain relationships, the cost of waiting is already too high. Mayo Clinic lists trouble paying attention and increased accident risk among insomnia’s downstream effects.

Breathing clues are the second. A partner who hears loud snoring, gasps, or pauses in your breathing is describing possible obstructive sleep apnea, a condition in which the upper airway narrows or closes repeatedly during sleep. Cleveland Clinic notes that apnea often presents as fragmented, unrefreshing sleep that people mistake for insomnia. It needs its own evaluation.

Mood change is the third. Insomnia and depression run in both directions; each raises the risk of the other. If sleeplessness arrives with persistent low mood, loss of interest, or hopelessness, the appointment is about more than sleep.

A new medicine or medical condition is the fourth. Some blood pressure drugs, steroids, decongestants, and stimulant-type medicines disturb sleep, as do thyroid disorders, chronic pain, reflux, and frequent nighttime urination. Mayo Clinic flags all of these as common contributors. Recognizing the link early can spare months of misdirected effort.

The fifth is relying on alcohol or over-the-counter sleep aids most nights. That pattern rarely ends well, and it is exactly the kind of thing a clinician would rather hear about sooner than later.

Who is usually referred to sleep medicine, and who is asked to try primary care first

Sleep medicine is a specialty, often staffed by physicians trained in neurology, pulmonology, psychiatry, or internal medicine who have completed additional training in sleep disorders, alongside psychologists who deliver behavioral treatment. Not everyone with insomnia needs that door. Understanding the usual pathway helps set expectations.

Primary care handles the first steps for most people. A family physician or internist can rule out common medical contributors, review medicines, screen for depression and anxiety, and start or refer for cognitive behavioral therapy for insomnia, the structured program guidelines rank first. The NHS describes this as the standard route: try changes to sleep habits, then see a GP, who may refer for talking therapy. Many people improve at this stage.

Referral to a sleep specialist is typically considered when insomnia has persisted despite those measures, when the picture is complicated, or when another sleep disorder is suspected. Mayo Clinic notes that a sleep center evaluation is more likely when the cause is unclear or when symptoms suggest apnea, restless legs syndrome, or an unusual behavior during sleep. Shift workers with a mismatched body clock, people with insomnia plus a chronic neurological condition, and those who have taken sleep medicines for years and want a way off them are also frequent referrals.

Who is asked to wait? Someone in the first few weeks of stress-related sleeplessness with no red flags is often advised to try the behavioral basics first, because the odds of natural recovery are good and a specialist visit adds little at that stage. Waiting here is a clinical judgment about likely benefit, not a dismissal.

The decision about referral sits with your treating clinician, but you can ask for it directly if you feel stuck.

What does a sleep specialist do? What actually happens at the consultation

People often picture wires and a laboratory bed. For insomnia, the first visit is mostly conversation, and it is a long one. The clinician wants a detailed history of your nights: when you go to bed, how long it takes to fall asleep, how often you wake, what you do when you wake, when you get up, and how you feel by mid-afternoon. They will ask about weekends versus weekdays, naps, caffeine and alcohol timing, exercise, screen use, bedroom environment, and, importantly, what you believe about your sleep.

Expect questions that reach beyond the bedroom. Mood, stress, pain, breathing, leg discomfort, heartburn, hot flashes, nighttime urination, and a full medicine and supplement list are all relevant. Mayo Clinic describes the evaluation as including a physical examination when a medical cause is suspected, sometimes with blood tests to check thyroid function or other contributors.

You may be asked to complete standardized questionnaires that score sleepiness, sleep quality, and insomnia severity, and to keep a sleep diary. Mayo Clinic suggests a diary of one to two weeks; this gives the clinician a real pattern rather than a memory of the worst nights.

Preparing helps enormously. Bring the diary if you have started one, a list of everything you take, and a short summary of what you have already tried and for how long. If a partner has noticed snoring, twitching, or breathing pauses, bring their account or bring them.

By the end of the visit, the specialist is usually able to say which type of insomnia you have, whether another disorder needs ruling out, and which treatment path fits. A sleep study is not a given, as the next section explains.

Do you need a sleep study for insomnia?

Polysomnography is an overnight recording of brain waves, eye movements, muscle activity, heart rhythm, breathing, and oxygen levels, performed in a sleep laboratory or, for breathing disorders, sometimes at home with a simplified device. It is the definitive test for sleep apnea and for unusual nighttime behaviors. It is not, however, a routine test for insomnia.

The reason is practical. Insomnia is diagnosed from history: your account of the nights and days, ideally backed by a diary. A single laboratory night rarely adds useful information about a person who lies awake with racing thoughts, and it may even show more sleep than the person perceives, which is common and does not mean the complaint is imagined. Mayo Clinic states that a sleep study is ordered when the cause of insomnia is unclear or when another sleep disorder is suspected, not as a default step.

So when does a specialist order one? Loud snoring, witnessed pauses in breathing, waking with a gasp or dry mouth, morning headaches, or marked daytime sleepiness despite adequate time in bed all raise the question of apnea. Kicking, acting out dreams, or injuring a partner during sleep raise other possibilities. Insomnia that has not budged after a full course of behavioral therapy may also prompt a closer look.

A related tool is actigraphy, a wrist-worn motion sensor worn for one to two weeks that estimates sleep and wake periods. It is useful for people whose diary and account do not match, or when a body-clock disorder is suspected.

If your clinician does not order a study, it usually means your history is clear enough to treat. If they do, it is because something in that history pointed elsewhere.

Insomnia, sleep apnea, or restless legs? A side-by-side look

Three conditions account for most nights of broken sleep that reach a specialist, and they are frequently confused with one another because the daytime result, exhaustion, looks the same. Treatment differs completely, which is why sorting them out early matters.

Feature	Insomnia disorder	Obstructive sleep apnea	Restless legs syndrome
Core complaint	Cannot fall or stay asleep despite the chance to	Sleep happens but is fragmented and unrefreshing	Urge to move the legs, worse at rest and in the evening
What a partner notices	Often nothing; you are quietly awake	Loud snoring, gasps, pauses in breathing	Kicking or leg jerks after falling asleep
Typical daytime feeling	Tired but wired; often cannot nap	Sleepy; may doze in meetings or while driving	Tired from delayed sleep onset
How it is diagnosed	Clinical history and sleep diary	Overnight sleep study (lab or home)	Clinical history; sometimes iron studies
First-line approach per guidelines	Cognitive behavioral therapy for insomnia	Airway support such as positive airway pressure	Address contributors, including iron if low; medicines in some cases

The distinctions above draw on descriptions from Mayo Clinic and Cleveland Clinic. Two details deserve emphasis. First, the “tired but wired” quality is a useful signal: people with insomnia disorder are often unable to nap even when given the chance, while people with untreated apnea fall asleep almost anywhere. Second, the conditions coexist. A meaningful share of people with apnea also meet the criteria for insomnia, and treating one without the other leaves the person still exhausted. A good consultation checks for all three rather than accepting the first label that fits.

Why CBT-I is the first treatment guidelines recommend

Cognitive behavioral therapy for insomnia, usually shortened to CBT-I, is a structured program that retrains the behaviors and beliefs keeping poor sleep going. Mayo Clinic, the NHS, and Cleveland Clinic all describe it as the recommended first treatment for chronic insomnia, ahead of medicines. That ordering surprises many people, so it is worth explaining why.

Chronic insomnia is sustained less by the original stressor than by what a person does in response to it: going to bed earlier to “catch up,” lying awake for hours so the bed becomes a place of frustration, napping, and building anxiety about the next night. CBT-I dismantles each of these. Cleveland Clinic outlines its main components: sleep restriction, which temporarily matches time in bed to actual sleep so the drive to sleep rebuilds; stimulus control, which re-links the bed with sleep rather than wakefulness; cognitive work on catastrophic thoughts about sleep loss; relaxation techniques; and sleep hygiene education.

The program is short. Cleveland Clinic describes a typical course as around six to eight sessions, delivered by a trained therapist in person, by video, in groups, or through structured digital programs. Sleep restriction can make the first week or two feel worse before it feels better, which is why supervision helps.

Evidence-wise, guideline bodies rank CBT-I first because studies show improvements that persist after the sessions end, whereas the benefit of a sleeping tablet stops when the tablet does. That is not a promise of a fixed outcome for any individual; some people need combined approaches, and some conditions such as untreated apnea blunt the response. It is, however, the clearest consensus in the field. If you have been offered only a prescription and never heard of CBT-I, asking about it is reasonable.

What is the quarter-hour rule for insomnia?

The quarter-hour rule is the everyday name for one piece of stimulus control, the CBT-I component that teaches the brain to associate the bed with sleep. The instruction is simple: if you have been lying awake for roughly fifteen to twenty minutes, get up, leave the bedroom, and do something quiet and dim-lit until you feel genuinely sleepy, then return. Mayo Clinic phrases the threshold as about twenty minutes. The exact number matters less than the principle, and clinicians deliberately say “roughly” because clock-watching itself feeds insomnia.

Why leave the bed at all? Because the alternative, hours of tossing, teaches your nervous system that the bed is where you lie awake and fret. After weeks of this, walking into the bedroom can trigger alertness the way the smell of a hospital corridor triggers unease. Getting up breaks that pairing. It also stops you from marinating in frustration, which raises arousal and pushes sleep further away.

The rule comes with companions. Go to bed only when sleepy, not merely tired. Keep a fixed wake time seven days a week, even after a bad night. Use the bed for sleep and intimacy only, not for working, scrolling, or watching. Avoid daytime naps during the program. Together, these rebuild what sleep scientists call sleep drive, the physiological pressure to sleep that accumulates during wakefulness.

Two cautions. The rule applies to insomnia disorder, not to people whose sleep is broken by pain, breathing problems, or caring for an infant. And it works best as part of a full CBT-I program rather than as a lone tactic, because getting up without also fixing bedtime and wake time can leave you simply more tired. Your clinician can tailor it, and can adjust it if you have a fall risk or a condition that makes night-time wandering unsafe.

Where sleep medicines fit, and where they don't

Medicines have a place in insomnia care, and pretending otherwise would be dishonest. But the place is narrower than most people assume, and every decision about them belongs to the prescribing clinician.

Guidelines position prescription sleep aids mainly for short-term use or as an adjunct while behavioral treatment takes hold. The NHS notes that a GP may prescribe sleeping tablets for a few days or weeks and rarely for longer, because benefit tends to fade with continued use while side effects such as next-day drowsiness, falls, and dependence persist. Mayo Clinic makes the same point: medicines are generally not recommended as a sole long-term strategy.

Several classes exist, and understanding mechanism helps you ask better questions. Benzodiazepines and the related “Z-drugs” enhance the action of GABA, the brain’s main calming chemical. Orexin receptor antagonists block orexin, a signal that promotes wakefulness, rather than sedating the whole brain. Some sedating antidepressants are used at doses lower than those for depression, and melatonin receptor agonists act on the body-clock system. Over-the-counter antihistamine sleep aids cause drowsiness as a side effect; Cleveland Clinic cautions that tolerance develops quickly and that they are generally unsuitable for older adults because of confusion and fall risk.

Melatonin, the supplement, is widely used but the evidence for chronic insomnia in adults is modest; the NIH Office of Dietary Supplements describes small effects on sleep onset and variable product quality.

None of this is a recommendation to start, stop, or change anything. If you are already taking a sleep medicine, do not stop abruptly; some cause rebound insomnia or withdrawal. Raise the question of whether it is still serving you, and how CBT-I might sit alongside it, with the person who prescribed it.

What the first weeks of treatment usually look like

People starting insomnia treatment want to know when they will feel different. Timelines below are typical ranges drawn from the sources cited, not promises, and individual courses vary.

The first one to two weeks are often about measurement rather than change. Mayo Clinic’s guidance to keep a sleep diary for a week or two applies here; the diary sets a baseline and reveals patterns such as a bedtime drifting earlier each week or a wake time that swings two hours between weekdays and weekends.

If CBT-I begins, the early sessions introduce sleep restriction and stimulus control. This stretch is frequently the hardest. Compressing time in bed means feeling sleepier by day for a while, and getting up at 2 a.m. under the quarter-hour rule is nobody’s idea of fun. Cleveland Clinic notes that this temporary increase in sleepiness is expected and is part of how the treatment rebuilds sleep drive. Clinicians warn against driving when unusually drowsy during this phase.

By the middle of a typical six-to-eight-session course, many people notice that they fall asleep faster and that awakenings, when they happen, are shorter. Time in bed is then gradually extended as sleep consolidates. The cognitive components, challenging beliefs like “if I don’t get eight hours I’ll be useless,” often land later, once there is evidence from the diary to argue with.

Where a medicine has been prescribed alongside, the prescriber will usually set a review point rather than an open-ended supply, consistent with the short-course guidance from the NHS.

Relapses happen, especially around stress, illness, or travel. A good program ends with a written plan for handling them, so a bad week does not become the start of a bad year.

What people often get wrong about insomnia (including the 'five stages')

Search engines are full of confident statements about insomnia that do not survive contact with the evidence. A few deserve correcting.

“There are five stages of insomnia.” There are not. No guideline or classification system describes insomnia in stages. The confusion likely blends two real things: the duration categories sleep medicine uses (short-term, chronic, and other), and the stages of normal sleep itself, which the NIH describes as three non-REM stages plus REM. Insomnia does not progress through a fixed sequence, and you cannot be “at stage four.”

“Everyone needs eight hours.” Mayo Clinic gives seven to nine as the adult range, and some healthy people sit outside it. Chasing a fixed number often makes insomnia worse by adding pressure.

“Lying in bed resting is almost as good as sleeping.” For people with insomnia it is actively counterproductive; it weakens the bed-sleep link that stimulus control tries to rebuild.

“A nightcap helps.” Alcohol speeds sleep onset but fragments the second half of the night and worsens snoring and apnea, as both the NHS and Mayo Clinic note.

“Sleeping pills are the real treatment; therapy is for people who won’t take them.” The reverse is closer to the guideline position. Behavioral treatment is first-line; medicines are the adjunct.

“If the sleep study was normal, nothing is wrong.” A normal study rules out apnea and some other disorders. It does not rule out insomnia, which is diagnosed by history.

“Insomnia is just a symptom of stress and will pass.” Sometimes. Past the three-month mark, it usually has a life of its own and needs to be treated as its own condition, even when the original stress has resolved.

Questions to ask your care team

A consultation is a two-way exchange, and the right questions can make the difference between leaving with a label and leaving with a plan. These are ones sleep clinicians say they are glad to be asked.

• Based on my history, do you think this is insomnia disorder, or could another sleep problem such as apnea or restless legs be part of the picture?
• Is any of my current medicines or supplements, including over-the-counter ones, likely to be disturbing my sleep?
• Do I need a sleep study, and if not, what in my history makes you confident I can skip it?
• Is cognitive behavioral therapy for insomnia available to me, and in what format: in person, by video, in a group, or through a structured digital program?
• If sleep restriction is part of the plan, how will I know whether the temporary daytime sleepiness is expected or a sign to pause?
• If a medicine is suggested, what is the plan for reviewing it, and how will we decide when to step it down?
• How should I handle the quarter-hour rule given my home layout, my age, or any fall risk?
• Which of my daytime habits, caffeine timing, exercise, light exposure, naps, matter most in my case?
• What signs would mean I should come back sooner than the planned follow-up?
• What is our plan if this course does not work?

Write the answers down, or ask whether you can record the key points. Sleep-deprived memory is unreliable, and the plan only helps if you can recall it at 2 a.m. when the old habits come calling. If something in the plan does not fit your life, say so in the room; adjustments made together stick better than ones you quietly abandon.

When to call your doctor

Most insomnia is uncomfortable rather than dangerous, and a routine appointment is the right pace for it. Certain signs, though, call for a prompt call to your doctor, and a few call for emergency help.

Contact your clinician promptly if you have fallen asleep or nearly fallen asleep while driving; if a partner reports that you stop breathing, gasp, or choke during sleep; if insomnia is accompanied by chest pain, breathlessness when lying flat, or waking suddenly short of breath; if you have new leg discomfort that eases only with movement; if your sleeplessness began after starting a new medicine; or if you find you cannot get through the day without alcohol or a sleep aid. Sleeplessness alongside persistent low mood, loss of interest, or feeling that life is not worth living also warrants an early appointment, because insomnia and depression amplify each other.

Seek emergency care, or call your local emergency number or a crisis line, if you have thoughts of harming yourself or others; if you have gone several nights with almost no sleep yet feel unusually energized, fast-talking, or invincible, which can signal a manic episode; if insomnia follows a head injury; or if you develop confusion, hallucinations, or seizures.

For everyone else: if sleep has been poor most nights for more than a few weeks, if changing your habits has not shifted it, or if your days are paying the price, book the appointment. You do not need to have reached three months, and you do not need to arrive with a theory. Describing your nights honestly is enough to start. What happens next, whether that is behavioral treatment, a sleep study, a medicine review, or a referral, is a decision for you and your treating team to make together.

Frequently asked questions

At what point should you see a doctor for insomnia?

See a doctor when poor sleep has persisted most nights for more than a few weeks and is affecting your days, or sooner if you have red flags such as breathing pauses, near-misses while driving, low mood, or a new medicine that coincides with the problem. You do not need to wait for the three-month chronic threshold. The NHS advises seeing a GP when habit changes have not helped and sleeplessness is interfering with daily life.

What is the 1/4 hour rule for insomnia?

The quarter-hour rule is a stimulus-control technique: if you have lain awake for roughly fifteen to twenty minutes, get out of bed, go to another dimly lit room, do something calm, and return only when sleepy. Mayo Clinic describes a threshold of about twenty minutes. The aim is to stop the bed from becoming associated with frustration and wakefulness. It works best as part of a full CBT-I program supervised by a clinician.

What are the 5 stages of insomnia?

There is no medical classification of insomnia into five stages. Sleep medicine categorizes insomnia by duration, short-term (under three months) and chronic (three months or longer), not by progressive stages. The idea likely mixes this with the stages of normal sleep, which the NIH describes as three non-REM stages plus REM sleep. If you encounter a ‘five stages’ list online, it is not drawn from guideline sources.

What will a sleep doctor do for insomnia?

A sleep specialist takes a detailed history of your nights and days, reviews medicines and health conditions, screens for mood disorders and for other sleep disorders such as apnea or restless legs, and often asks for a one-to-two-week sleep diary. Based on that, they typically recommend cognitive behavioral therapy for insomnia, consider whether a sleep study is needed, and discuss whether any medicine is appropriate, deferring prescribing decisions to your treating team.

What are chronic insomnia symptoms beyond not sleeping?

Chronic insomnia involves difficulty falling asleep, staying asleep, or waking too early at least three nights a week for three months, plus daytime effects. Mayo Clinic lists daytime fatigue, irritability, trouble concentrating, low mood or anxiety, reduced performance at work or school, more errors or accidents, and ongoing worry about sleep itself. The daytime consequences are part of the definition; sleeping fewer hours without any of these is not insomnia disorder.

What does a sleep specialist do differently from a family doctor?

A sleep specialist has additional training in sleep disorders and can distinguish insomnia from conditions that mimic it, such as sleep apnea, restless legs syndrome, or circadian rhythm disorders, and can order and interpret sleep studies. Family doctors handle most straightforward insomnia and can start or refer for CBT-I. Referral is usually considered when insomnia persists despite primary care measures or when another sleep disorder is suspected.

Do I need a sleep study for insomnia?

Usually not. Insomnia is diagnosed from your history and sleep diary, not from an overnight recording. Mayo Clinic states that polysomnography is ordered when the cause is unclear or when another disorder, particularly sleep apnea or unusual behaviors during sleep, is suspected. Loud snoring, witnessed breathing pauses, gasping awake, or marked daytime sleepiness despite adequate time in bed are the kinds of clues that lead a specialist to order one.

How to talk to your doctor about insomnia so the visit is useful?

Bring a sleep diary covering one to two weeks, a complete list of medicines and supplements, and a short account of what you have tried and for how long. Describe a typical night and a typical day, including naps, caffeine, and alcohol. Mention any snoring, breathing pauses, leg discomfort, or mood changes, and ask about a partner’s observations. Ask directly whether cognitive behavioral therapy for insomnia is available to you.

Can insomnia go away on its own?

Short-term insomnia triggered by a stressful event often resolves once the stressor eases, according to Mayo Clinic and the NIH. Chronic insomnia lasting three months or more is less likely to fade without treatment, because habits and worries about sleep begin to sustain it independently of the original trigger. That is why guidelines recommend structured behavioral treatment once the pattern has become established rather than waiting indefinitely.

Are over-the-counter sleep aids safe for long-term insomnia?

Guidelines do not recommend them as a long-term solution. Cleveland Clinic notes that antihistamine-based sleep aids lose effect quickly with regular use and can cause next-day drowsiness and confusion, especially in older adults, along with a higher fall risk. Melatonin supplements have modest evidence for adult insomnia per the NIH Office of Dietary Supplements. If you rely on any sleep aid most nights, raise it with your clinician rather than stopping abruptly.

References

• Cleveland Clinic: Insomnia
• NHS: Insomnia
• NIH National Heart, Lung, and Blood Institute: Insomnia

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.