Sleep: Most Popular Articles
Men often wake up with an erection in the morning, but what causes morning wood or morning erections? Discover the cause of this phenomenon.
How should I take melatonin? This over-the-counter supplement may help you to sleep better if you have insomnia or a circadian rhythm disorder, but how should you use melatonin? Learn about the appropriate dose, when you should take it, and whether it is safe to take melatonin every night.
Does a lack of morning wood suggest that you have erectile dysfunction? Morning erections are common among men, but what if they don't happen? What might be the cause? Learn how the presence or absence of morning wood may differentiate between the causes of impotence.
It may be a useful skill to have when you want to get some rest when you are supposed to appear attentive, but is it really possible to sleep with your eyes open? Find out in what settings this might be possible.
Learn about the common features of the terrifying condition known as sleep paralysis, including how often it occurs, the potential causes, and how it should be treated.
What causes early morning awakenings? If you find yourself waking before your alarm clock goes off, there may be a handful of causes to consider. Some of the potential triggers could include insomnia, mood disorders like anxiety or depression, sleep apnea, and circadian rhythm disorders. Learn about these various causes of early morning awakenings.
If you have difficulty falling or staying asleep, you may want to learn what to take when you can't sleep. From food to beverages to sleeping pills, there are many options to consider. What solutions are available at home? When should you see your doctor?
What are the causes of sleep paralysis? Is there a way to avoid having sleep paralysis? What are some unscientific explanations given for the occurrence? Learn about what leads to sleep paralysis.
There are several reasons why you might feel sleepy, such as having sleep apnea or narcolepsy. Find out the different reasons here, and how you can treat them.
What is ZzzQuil? This over-the-counter sleep aid may be helpful for treating acute insomnia. It contains diphenhydramine, a common ingredient in non-prescription sleeping pills. How does ZzzQuil work, and what are some of the potential side effects? Learn about ZzzQuil, and how it may help you to fall and stay asleep easier.
Learn how to clean CPAP, including a step-by-step process for maintaining your equipment.
If you have ever experienced extreme sleep deprivation, you may begin to question your sanity, especially if you start to see things that are not there. You may even wonder: Can sleep deprivation cause hallucinations?
Sleep paralysis is a unique experience, but what are some of the most common symptoms of this condition? From an inability to move to hallucinations to fear, learn about the symptoms of sleep paralysis.
Is it possible to fart while asleep? Why is it that people seem to pass gas more first thing in the morning? Learn about flatulence and its relationship to sleep.
Though you may be hesitant to observe better sleep guidelines, perhaps understanding the 10 worst things that can ruin your sleep will prompt you to change your ways. Avoiding these poor choices may lead to better rest and, in turn, better health.
Learn what diphenhydramine is, including its use in the treatment of insomnia. This article describes its indications for use, how it may work, who should not use it, what the potential side effects are, and what safety monitoring should occur.
Can insomnia be an early sign of pregnancy? There are certain symptoms early in pregnancy that might lead to insomnia, but difficulty falling or staying asleep is a common occurance. Is it a trustworthy symptom suggesting that you are pregnant?
In some settings, it may be advantageous to use an alternative to continuous positive airway pressure (CPAP) called bilevel or BiPAP. What is BiPAP and when is it most often used?
If you return to work after lunch, you may feel especially sleepy and wonder: Why am I sleepy after eating lunch? Learn why this occurs and whether it relates to the food you eat or instead is due to natural patterns of wakefulness and sleepiness called the circadian rhythm. In addition, you can learn a few ways to counteract this desire to fall asleep.
Learn the definition of AHI. Sleep.
If you have a sleep study such as a polysomnogram, you may receive a report from your doctor that describes the severity of your sleep apnea according to an AHI, but what is the AHI? Learn about the apnea-hypopnea index and what it might mean to your overall health and response to treatment with CPAP.
For those who use continuous positive airway pressure (CPAP) to treat their sleep apnea, the question inevitably arises about whether you are required to use distilled water in the humidifier. Why should you even use the humidifier? If you don't use distilled water, can you use tap water? What about boiling or filtering the water? What consequences may result if you don't use distilled water?
Continuous positive airway pressure (CPAP) is effective in treating obstructive sleep apnea, but it may lead to a common side effect: gas. This may manifest with burping, farting, and a bloated stomach. What causes CPAP gas and how can it be avoided? Learn about the treatment options of CPAP gas, including sleep position and heartburn medication, that may provide you some relief.
Learn what trazodone is, including its use in the treatment of insomnia. This article describes its indications for use, how it works, who should not use it, what the potential side effects are, and what safety monitoring should occur.
So your doctor recommends you undergo a sleep study, but what should you expect? Though you may have some anxiety about the experience, take a few moments, and lay those fears to rest. Learn the purpose, what to do before the evaluation, what to bring, and about the process once you are there.
Learn how writing out a list of your stresses with a plan can reduce a racing mind at night and improve insomnia. Discover how to let your stress go.
Learn how smoking cigarettes or using nicotine products may affect your sleep.
Sleep changes dramatically during pregnancy, from the first trimester through labor and delivery. Hormonal changes alter the patterns of sleep. New difficulties sleeping may appear such as sleep apnea or restless legs syndrome. Discover how sleep changes in pregnancy.
In what is a common experience, especially during adolescence or periods of abstinence, wet dreams may occur during our sleep, but what is a wet dream? Learn about wet dreams (or nocturnal emissions), what causes them, and whether they relate to sexual desire or need.
Learn how to use the goal apnea-hypopnea index (AHI) recorded on your CPAP machine to help monitor and guide your treatment of sleep apnea.
It seems like sleep should come naturally, but when it doesn't, you might quickly find yourself pleading,
Learn what causes racing thoughts as part of insomnia and what you can do to turn off your mind at night, including addressing stress and relaxation techniques.
Learn about the eight-hour myth, how sleep needs vary from one person to the next and across a lifetime, what is meant by sleep debt, and how to easily determine your sleep needs.
If you have difficulty falling or staying asleep or your sleep is not refreshing, you may be suffering from insomnia. Learn about the various subtypes of insomnia, the common symptoms, various potential causes, how it is diagnosed, and the treatment options including medications and behavioral changes.
Sleep apnea is a common condition that affects millions of Americans and the following sleep apnea overview includes a description of this condition including its definition, sub-types, symptoms, causes, diagnosis, treatment, and consequences.
What is overnight oximetry? Learn about one of the most common initial screening tests for sleep disorders called overnight oximetry.
Some people who use continuous positive airway pressure (CPAP) to treat their sleep apnea have great difficulties with mouth breathing, but there are multiple fixes that may be helpful in preventing mouth breathing with CPAP.
Nocturnal cramps are one of the common disorders that can affect the legs during the night, causing discomfort and disrupting sleep. Learn about this condition, including its causes, the conditions associated with it, what your medical provider will find on examination, and what other similar conditions it might be.
What is sleep apnea? Learn about sleep apnea, including: the definition, the various causes, the classic symptoms, the important consequences, and the diagnosis.
Sleep deprivation is seemingly universal in its occurrence in the modern world, but what are the physical effects of sleep deprivation? There are many important symptoms and even significant impacts on your abilities. In addition, there are a variety of changes that occur in your body if you do not get enough sleep. Discover some of these effects.
It may sound unbelievable, but can sleep deprivation actually cause your death? If you are concerned about the ultimate health consequence of sleep loss -- death -- you may also want to be mindful of other increased risks associated with simply not sleeping enough.
If you find yourself lying awake at night, waiting desperately for sleep to come, you may wonder why you can’t sleep. This is most commonly due to insomnia, but there are other conditions that might unexpectedly impact your ability to sleep. Learn the reasons why you can't sleep.
If you have ever seen your infant jerk or move suddenly during sleep, you may want to learn about sleep myoclonus. What is sleep myoclonus? What testing (if any) should be done?
When does a deviated septum cause snoring? Learn what a deviated septum is, how it can be one of the more common causes of snoring, and what can be done about it.
Infectious mononucleosis (or mono) is a common disease that may result in profound fatigue, but how long does the fatigue typically last? Learn more about the fatigue that occurs in mono.
Learn what the symptoms of sleep deprivation are. From sleepiness to mood changes to difficulty thinking, there may be some unexpected consequences to not getting enough sleep.
What are the risks of sleep apnea? Understand what chronic medical conditions may be worsened by untreated sleep apnea and why those who have it may be at risk for heart attacks, stroke, and sudden death.
Learn better sleep guidelines and 10 ways to get a better night's sleep tonight.
What are some of the symptoms of sleep apnea? Is it possible that some of your health problems may be due to this condition? Learn about the various symptoms of sleep apnea.
In a rare and unusual sleep disorder, individuals may hear loud noises during sleep transition that may represent exploding head syndrome. Learn about this condition, what it is associated with, and the treatment options.
If you suffer from excessive sleepiness due to a sleep disorder or simply not sleeping enough, you may wonder how to stay awake. Staying awake may be accomplished by following these 10 simple recommendations.
If you use a heated humidifer with your continuous positive airway pressure (CPAP) to treat your sleep apnea, you may notice that water sometimes collects in your CPAP tubing. How can you avoid this unwanted moisture? Learn changes that you can make to reduce the chance of water splashing in your face when you use your CPAP, including options such as heated tubing that may eliminate the occurrence.
There are certain complex behaviors that can occur during sleep. These so-called parasomnias may include the ability to send text messages on your cell phone while remaining asleep. How is sleep texting possible?
The prescription medication prazosin -- sold under the brand name of Minipress -- is a prescribed drug used to treat nightmares in the setting of post-traumatic stress disorder (PTSD). Learn more about this medication.
Although many people with restless legs syndrome (RLS) may never be able to identify a cause to their disorder, often it results from other secondary causes. There are many conditions that may independently lead to symptoms of RLS and these are described here.
What are some signs that your CPAP is not working? Persistent symptoms, snoring, and old equipment may indicate that your CPAP machine needs attention.
What Are Parasomnias: If you have ever had an unusual behavior or experience during your sleep, you may
How can I get sleep paralysis? This common condition relates to a disruption in the transition between dream (or REM) sleep and wakefulness. Though there may be some factors beyond your control, you may be able to do a few things to trigger an episode.
Aside from a carefully taken history and physical examination by a sleep specialist, there additionally are certain insomnia tests that may be used to diagnose the condition. Learn about how polysomnography, MSLT, and actigraphy may clarify the diagnosis.
It is one of the most common of the sleep disorders, but what is insomnia? Learn its definition, how often insomnia occurs, and its classic clinical features.
What causes mouth dryness at night? Medications, medical conditions, and sleep disorders including snoring or sleep apnea may contribute. Learn more.
Oxygen therapy is sometimes used to treat sleep apnea, especially when concern for the disorder is first raised. However, in some settings, oxygen use may actually do more harm than good.
Waking frequently during the night to pee may be a condition called nocturia. What is nocturia? What are some of the potential causes? Learn about nocturia and why it may be more common as we get older.
Sleep paralysis is a frightening experience. It may leave you seeking a treatment. How is sleep paralysis treated? Learn how to prevent these episodes with simple lifestyle changes or even medication.
Narcolepsy may cause excessive sleepiness and other symptoms. Learn about this neurologic condition, including its causes and options for diagnosis and treatment.
Learn how light exposure and medications like melatonin and sleeping pills may ease the transition to a new time zone after a long trip.
For those who suffer from sleep seizures, there is a complex interplay that exists between any seizure disorder and sleep. Learn about this relationship, what types of epilepsy are most commonly associated with sleep seizures, and how antiepileptic medications can affect sleep.
Parasomnias are a group of disorders that include behaviors that occur around sleep. A common parasomnia affecting children is confusional arousals. What are confusional arousals and what can be done about them?
Learn what doxylamine is, including its use in the treatment of insomnia. This article describes its indications for use, how it may work, who should not use it, what the potential side effects are, and what safety monitoring should occur.
Learn better sleep guidelines and 10 ways to get a better night's sleep tonight.
How often should you replace your CPAP supplies? From the mask to the tubing to the humidifier, learn about the replacement schedule you should follow.
Learn about acute insomnia, including: the definition, the various causes, the classic symptoms, and how it is diagnosed.
What is PLMS? Periodic limb movements of sleep (PLMS) is one of the sleep disorders that may cause disruptive movement of your legs, much like restless legs syndrome (RLS). Learn more about PLMS.
Over-the-counter sleeping pills that contain diphenhydramine may have side effects such as confusion, urinary retention, and dizziness in older adults. Learn more.
Learn the definition of oxygen desaturation index (ODI). This measurement may appear on reports from overnight sleep studies such as a polysomnogram or overnight oximetry. How does it relate to sleep-disordered breathing such as snoring and sleep apnea? Find out more about ODI and what it may mean to your health.
What are the effects of obsessive-compulsive disorder on sleep? This common anxiety disorder can be disruptive during the day, but can it lead to insomnia at night? Learn about OCD and how it might impact your sleep.
Learn how pupil size as measured with a test called pupillometry can be used to objectively identify sleepiness and the degree of sleep deprivation.
What are the available treatment options for sleep apnea and what is the best option for me? What is CPAP and how does it work? Are there other options besides CPAP? What are the benefits of treatment?
Learn about delayed sleep phase syndrome, which is one of the circadian rhythm sleep disorders.
Learn about the prescription medication gabapentin, sold under the brand name Neurontin or Horizant, which can effectively treat the uncomfortable sensations that occur in restless legs syndrome (RLS).
For nearly everyone who has been diagnosed with sleep apnea, the conversation quickly turns to possible treatment options. The most commonly used one is continuous positive airway pressure (CPAP), but what is CPAP? Take a moment to learn about the basics of CPAP.
If you are struggling with insomnia or other problems related to your sleep, you may be ready to make some serious changes to feel rested and function better through the day. It may be time for a comprehensive overhaul that follows a specific plan. Set aside the next 30 days to focus on how to sleep better. By following the recommendations and advice provided, you will be able to improve your sleep and life.
Sleep restriction may be just the treatment you need to fix your insomnia. Learn how spending too much time in bed may be ruining your sleep.
Learn the definition of circadian rhythm.
Learn the definition of REM sleep.
If you have been prescribed continuous positive airway pressure (CPAP) to treat your sleep apnea, you may wonder if the pressure setting is based on your severity of apnea. Learn if and how the prescribed setting may be related to the degree of sleep apnea as well as other factors that may be involved.
Alcohol may affect sleep and impact sleep apnea in multiple ways, but how does this work? Should people with sleep apnea avoid alcohol altogether? The answers may surprise you.
It may seem logical that characteristics of your body can impact your health. For example, how does your neck size affect sleep? Learn how neck circumference may predispose you to breathing disorders during sleep like snoring and sleep apnea.
You may recall your dreams upon awakening in the morning, but do you remember them more often at that time? What causes morning dreams? Learn the answer and how it relates to the timing of the various sleep stages.
If bed bugs have invaded your sleeping space you may want to learn how to treat their bites and, more importantly, how to get rid of them. The elimination of bed bugs may be difficult, however, and you may discover that it might not be worth it.
What is the relationship between ADHD and sleep? Children who have sleep disorders and attention deficit hyperactivity disorder (ADHD) may have similar symptoms. These may include: inattentiveness, overactivity, and restlessness. The interplay between these disorders is significant, and diagnoses may be mistaken because of the overlap.
Sleepwalking is a common condition that occurs in children, but what underlies this behavior? Sleepwalking may occur in the setting of other sleep disorders such as parasomnias, sleep apnea, and restless legs syndrome. You may wonder not only about the causes of sleepwalking, but also whether it requires treatment.
Learn basic information about some of the most common types of sleep disorders, including: snoring, insomnia, sleep apnea, parasomnias, restless legs syndrome, narcolepsy, jet lag, and circadian rhythm disorders.
What is the experience like for getting and using an oral appliance to treat sleep apnea or snoring? What do you need know to find an effective option? What side effects should be avoided? Learn about getting and using an oral appliance.
Learn the definition of respiratory disturbance index or RDI.
If you or a loved one have ever acted out dreams while remaining asleep, you may have realized something was wrong, but what is REM behavior disorder? Learn about the cause and dangers of acting out one's dreams, what medical conditions are associated, and what treatment options are available.
If you experience difficulties staying or falling asleep or in obtaining sleep of restorative quality -- common symptoms of insomnia -- you may be interested in learning more about sleeping pills. There are over-the-counter and prescription medications available, and a little research may help you to find the best option. Learn more with an overview of sleeping pills.
Can Ambien affect your memory? How might this common treatment for insomnia cause amnesia? Learn about this side effect and some of the consequences that might result.
If you are not sleeping enough and are enduring the effects of sleep deprivation, you might be interested in learning some of the treatment options available for this condition. Learn 10 treatments that might improve your symptoms from sleep deprivation.
For those who have been diagnosed with sleep apnea, the next step will be to establish treatment, and if this includes continuous positive airway pressure (CPAP) you may wonder how to choose a CPAP mask. The options available to you are numerous, but before becoming overwhelmed you can follow a few simple guidelines
What is sleep-related rhythmic movement disorder (RMD)? If your child has been observed to rock, head bang, or rhythmically move in the early part of sleep, you may wish to learn about RMD. What conditions might occur with it? Learn about the diagnosis of RMD as well as the treatment options to keep your child safe.
Learn how a specially shaped pillow might help you if you are an adult with symptoms of obstructive sleep apnea or heartburn.
What is the relationship between sleep deprivation and weight gain? Explore the latest research on this subject and learn how a good night's sleep might actually keep the pounds off.
Learn the definition of paradoxical sleep.
If you hardly spend any time in bed, is this insomnia? Could it be that you have shortened sleep needs? Explore what these scenarios might represent.
Is it recommended to take a break from using continuous positive airway pressure (CPAP) when you have a cold? Are there medications that might make it easier to use the therapy with nasal congestion? How should the CPAP be cleaned after a cold? Learn whether you should take a break from CPAP with the common cold.
If you find yourself working odd hours, you might wonder: How can I adjust my sleep schedule to work night shifts? This can be an important adjustment. If you struggle, you may suffer from insomnia and sleep deprivation. Find out the best ways to help yourself adjust your sleep schedule to work nights.
What is RLS? Learn about restless legs syndrome (RLS), including the most common symptoms and treatment options.
For those who suffer from the ill effects of sleep disorders, there are many diagnostic tests available that may lead to a better understanding of what the problem may be. Learn what the various options are, including: overnight oximetry, polysomnography, multiple sleep latency testing, and actigraphy.
The process of going to sleep is highly dependent upon behaviors, and disruptions may lead to difficulty falling asleep. So what sleep rituals should be part of your bedtime routine? Learn how a routine may help you to avoid insomnia.
Learn what Ambien is, including its use in the treatment of insomnia. This article describes its indications for use, how it works, who should not use it, what the potential side effects are, and what safety monitoring should occur.
It is something that you may experience nearly every morning when you wake up: that compelling, nearly irresistible desire to go back to sleep. What is sleep inertia and how does it make it hard to wake up?
Although most people should be concerned about not sleeping enough, you may wonder: how much sleep is too much sleep?
You have likely seen the Select Comfort mattress advertisements, but what is your sleep number? Learn what factors go into determining your sleep number and how it might help you to sleep better.
It can be difficult to sleep during pregnancy, whether due to insomnia, restless legs syndrome (RLS), narcolepsy, or behaviors called parasomnias. Are there safe medications to take while pregnant? Review the safety guidelines and a list of medications that you and your doctor might consider to treat your sleep problems during pregnancy.
Though relatively safe, CPAP is linked to some potential problems. Learn about what you may encounter when using CPAP.
The health consequences of being overweight or obese are well-known, but how does being overweight affect your sleep? It may result in conditions such as sleep apnea and restless legs syndrome. Conversely, sleep problems may also cause you to gain weight. Learn more about these relationships.
It is sometimes difficult to judge just how much sleep your body needs to feel rested. This simple step-by-step process will guide you in how to determine your individual sleep needs.
The American Academy of Sleep Medicine (AASM) has released the 3rd edition of the International Classification of Sleep Disorders (ICSD-3) as an eBook in its
For those who are starting treatment for sleep apnea with continuous positive airway pressure (CPAP), you may ask: How am I supposed to get used to CPAP? Learn how simple relaxation techniques may allow you to make the initial adjustment and use the therapy with greater success.
Learn how naps may affect sleep at night, especially if you suffer from insomnia. Review the role of sleep drive and the circadian rhythm in sleepiness.
If you find yourself struggling to get up in the morning, you may seek some advice on how best to wake up. Explore some options that might get your day off to a better start.
To appreciate how various sleep disorders occur, and the function of normal sleep, it is necessary to have an understanding of the basics of sleep stages. These include the pattern called sleep architecture and the two main subtypes of NREM and REM sleep. Learn about these concepts and better understand what it is to sleep.
Learn about some of the alternative options available for the treatment of sleep apnea.
There are many common symptoms that may suggest the presence of a sleep disorder. Some of these symptoms, such as fatigue, may also occur with other medical disorders. In addition, each sleep disorder may have specific symptoms unique to it. What are symptoms of sleep disorders?
Continuous positive airway pressure (CPAP) is often used to treat sleep apnea. If you have been recommended to use, or have recently started this treatment, you may wonder how it will change your life. One questions may be,
Difficulties falling asleep or staying awake at the proper times may suggest you have a problem with your biological clock called a circadian rhythm disorder, but what are circadian rhythm disorders? These common conditions may include wanting to sleep at an atypical time, irregular sleep patterns, and even jet lag or shift-work sleep disorder. Discover more about the circadian rhythm disorders and learn by example.
This article answers more than a dozen of the most common questions associated with using CPAP to treat sleep apnea. Learn to live with CPAP and sleep better.
Learn the definition of hypnagogic hallucinations.
We have all had bad dreams or nightmares, but how can we tell if these are due to a stressful event in our life and if they may be part of post-traumatic stress disorder (PTSD)? Learn about this condition, how it relates to sleep disturbances, and what treatment options are available.
Some 80 different types of sleep disorders make up the complete list of sleeping disorders based on the International Classification of Sleep Disorders. Learn about 80 conditions including insomnia, sleep behaviors called parasomnias, circadian rhythm problems, movements, psychiatric conditions, and breathing disorders such as sleep apnea. You can also find the diagnostic codes used for health insurance billing purposes.
What are the effects of panic disorder and panic attacks on sleep? Can panic attacks happen at night? How might this be related to nightmares or insomnia? How should panic be treated? Learn about the relationship between panic attacks and sleep.
What are nasal pillows? This style of CPAP mask may be just the interface you need to overcome certain problems tolerating CPAP, such as claustrophobia and air leaks. Learn more about this option.
Narcolepsy is a disorder of excessive daytime sleepiness, but it also has four features that make it unique among the sleep disorders. Though only one in three people with narcolepsy have all four features, they can be useful in identifying those at risk for the disorder.
Insomnia is difficulty falling or staying asleep. Can it be caused by a poor diet? Learn whether a vitamin deficiency can cause insomnia.
Learn the definition of hypopnea.
If you have ever been curious about the structure of sleep, you may want to learn about a concept called sleep architecture. This idea helps us to understand the pattern of the stages of sleep, how this changes as we get older, and what impact sleep disorders may have.
Melatonin is a naturally occurring hormone that may be effective in treating some sleep problems including jet lag, insomnia, and circadian rhythm sleep disorders.
Learn the definition of penile tumescence.
Learn about 10 surprising signs of sleep apnea, including: depression, problems thinking, impotence, uncontrolled high blood pressure, waking to urinate, teeth grinding, unrefreshing sleep, heartburn, sleepwalking, dry mouth, and drooling.
Discover more about advanced sleep phase syndrome, a disorder affecting the biological clock which controls the body's natural circadian rhythm.
If low iron levels are causing your restless legs syndrome (RLS), you may be interested in learning how to treat restless legs with iron supplements. Iron deficiency may be corrected with over-the-counter iron supplements or by changing your diet to include iron-rich foods. Learn how to use iron to help treat this common sleep disorder that makes it hard to fall asleep.
Can you sneeze while asleep? Certain body processes seem to be turned off when we go to sleep, but is sneezing one of them? Learn whether it is possible to sneeze during sleep.
If you snore loudly and are planning to take a flight, you may wonder how you can avoid snoring on the airplane. From preventive surgery to last-minute interventions, learn a few simple steps that might help you to avoid any potential embarrassment.
Continuous positive airway pressure (CPAP) is the preferred treatment for obstructive sleep apnea, but what if you can't keep it on once you fall asleep? Learn how to keep your CPAP mask on at night, including the importance of mask fit, pressure settings, and the use of sleeping pills.
class="no-js" itemscope itemtype="http://schema.org/Article" > itemprop="description" >You have likely
Learn what Ritalin is, including its use in the treatment of ADHD, narcolepsy, and chronic fatigue syndrome. This article describes its indications for use, how it works, who should not use it, what the potential side effects are, and what safety monitoring should occur.
Learn about Chronic Fatigue Syndrome, including: what it is, its most frequent symptoms, and how it is diagnosed.
Learn the definition of excessive daytime sleepiness.
Learn about the rare genetic disorder called fatal familial insomnia. This condition starts with difficulty sleeping but gradually evolves to include additional neurological symptoms and ultimately ends in coma and death.