Abhinav Singh, MD, MPH, FAASM
Medical Reviewer

Biography
Dr. Abhinav Singh, board certified in sleep medicine and internal medicine, is the medical director of the Indiana Sleep Center, which is accredited by the American Academy of Sleep Medicine. He’s also a clinical assistant professor at Marian University College of Medicine in Indianapolis, where he developed and teaches a sleep medicine rotation.
Dr. Singh’s research and clinical practice focuses on sleep disorders, including excessive daytime sleepiness, narcolepsy, sleep apnea, chronic snoring, insomnia, and sleep education. He firmly believes in his philosophy of “360 degrees of sleep awareness,” in which every single person must be educated about the importance of sleep so that they can further educate others.
Along with being a fellow of the American Academy of Sleep Medicine, Dr. Singh is a peer reviewer for the Journal of Clinical Sleep Medicine, Sleep Health (from the National Sleep Foundation), and the Journal of Sleep Disorders: Treatment and Care. Dr. Singh is co-author of the book “Sleep to Heal: 7 Simple Steps to Better Sleep.”
Education
- Medical Degree: Topiwala National Medical College and Nair Hospital
- Master’s of Public Health: University of Illinois
- Residency: St. Joseph Hospital/University of Illinois
- Fellowship: Northwestern University
- Board Certifications:
- Internal Medicine — American Board of Internal Medicine
- Sleep Medicine — American Board of Internal Medicine
Read Articles Reviewed by Dr. Singh

What Is a Somnologist?
A somnologist is a sleep doctor that specializes in diagnosing and treating sleep disorders. Learn…

Infant Sleep Cycles
A baby's sleep cycles differ from adult sleep and change rapidly with age. Learn about…

Oral Appliances for Sleep Apnea
Oral appliances can help treat obstructive sleep apnea by keeping the airway open during sleep.…

Effects of Sleep Deprivation
Sleep deprivation can affect your mood, thinking, immune system, and physical health. Learn the short-…

Idiopathic Hypersomnia
Idiopathic hypersomnia causes excessive sleepiness even after plenty of sleep. Learn about its symptoms, possible…

COVID and Sleep Apnea
Learn about the connection between sleep apnea and COVID, including the risk of severe illness,…

Why Do I Wake Up With a Stuffy Nose?
Waking up with a stuffy nose? Learn what causes morning nasal congestion and simple ways…

Is Insomnia a Mental Illness?
Insomnia is a sleep disorder that has a complex relationship with mental illness. Learn about…

Sleep Apnea Symptoms in Women
Sleep apnea symptoms in women can include insomnia, headaches, fatigue, and mood changes. Learn the…

Melatonin Benefits
Explore the potential benefits of melatonin for sleep, including insomnia, jet lag, and circadian rhythm…

Anxiety and Insomnia
Anxiety and insomnia have a two-way relationship. Learn how each condition can make the other…

How Long Can You Go Without Sleep?
Going without sleep for even 24 hours has health consequences. Learn how long you can…

Best Sleep Schedule for Night Shift Workers
Do you work the night shift? Learn what sleep schedules and strategies can help you…

Hypersomnia Treatment
Treatment for hypersomnia may include medications, therapy, and lifestyle changes. Learn why the right treatment…

How to Pull an All-Nighter
Worried about finishing that important project? Stressed about an upcoming night shift? Learn how to…

Sleep-Related Hypoventilation
Sleep-related hypoventilation causes breathing to become too slow or shallow during sleep. Learn about its…

Why Does Coffee Make Me Sleepy?
Many people turn to coffee to wake up, but some find that it makes them…

Multiple Sleep Latency Test (MSLT)
The multiple sleep latency test (MSLT) is designed to identify certain sleep disorders. Learn more…

Night Eating Syndrome
Night eating syndrome is an eating disorder that causes excessive eating at night. Learn the…

Short Sleeper Syndrome
Short sleeper syndrome is a rare condition in which people thrive on less sleep than…

Ashwagandha for Sleep
Ashwagandha may help and reduce stress and improve sleep for some people. Learn what the…

Obesity Hypoventilation Syndrome
Obesity hypoventilation syndrome (OHS) is a breathing disorder that can cause low oxygen levels and…

Dry Mouth at Night
Is dry mouth disrupting your sleep? Learn the causes of this common condition, along with…

How to Get More REM Sleep
REM sleep is important for learning, memory, and creativity. Learn how much REM sleep you…

Does Daytime Tiredness Mean You Need More Sleep?
Daytime tiredness isn't always caused by too little sleep. Discover what may be making you…

Can You Sleep With Your Eyes Open?
Sleeping with your eyes open, a condition called nocturnal lagophthalmos, can cause dry, irritated eyes.…

How to Wake Up Early
With over half of people hitting snooze in the morning, waking up early is hard…

Sleep Apnea Surgery
When a person with sleep apnea can't tolerate other treatments, doctors may recommend surgery. Learn…

What to Do When You Can't Sleep
Can’t sleep? Discover simple, expert-backed tips for what to do and what to avoid when…

Yoga Nidra for Sleep
Yoga nidra involves lying on your back while focusing on mental imagery. Learn how yoga…

Sciatic Nerve Pain Relief at Night
Sciatica can cause pain, tingling, or other uncomfortable sensations in the lower back, hips, legs,…

Do Melatonin Gummies Work?
Are melatonin gummies really effective? Discover what you should know about taking melatonin gummies at…

Can Anxiety Cause Night Sweats?
Anxiety is one possible cause of night sweats. Learn how anxiety affects the body's stress…

How to Sleep Longer
Many people struggle to get enough sleep, leaving them feeling unrefreshed and tired. Get science-backed…

How Much Sleep Do Adults Need?
Sleep is essential, but how much is enough? Learn about how many hours of sleep…

What Causes Night Sweats?
Wondering why you wake up drenched in sweat? Learn what causes night sweats and when…

Shift Work Disorder Symptoms
Learn the symptoms of shift work disorder, including insomnia, excessive sleepiness, and difficulty staying alert,…

Rhythmic Movement Disorder
Repetitive movements like body rocking and head banging are common in babies and children. Learn…

Nocturnal Seizures
Do you think you or a loved one has nocturnal seizures? Learn nocturnal seizure symptoms,…

Sleep Deprivation
Sleep deprivation can come with serious consequences, including a higher risk of car crashes. Learn…

Can Pink Noise Help You Sleep?
Emerging research suggests pink noise may improve sleep. Learn how it may help improve sleep…

Light and Sleep
Light and sleep are closely intertwined. Learn about how different types of light exposure affects…

Stretching Before Bed
Stretching before bed can help relieve tension in your muscles so you feel more relaxed.…

How to Sleep With a Sore Throat
A sore throat can make it hard to get comfortable at night. Discover practical tips…

Sleep Myths
Separate fact from fiction with this guide to common sleep myths. Explore what research says…

Precognitive Dreams
Have you ever had a dream that later seemed to come true? Learn what precognitive…

How to Go to Sleep Earlier
Whether you want to get more sleep, wake up earlier, or change your nighttime routine,…

STOP-Bang Score
The STOP-Bang Questionnaire is a simple test that assesses your risk of obstructive sleep apnea.…

Is Sleeping on Your Stomach Bad?
Sleeping on your stomach can lead to back, neck, and shoulder pain. Learn how to…

How to Stop Snoring
Snoring is extremely common, but not inevitable. Learn about bedtime adjustments, lifestyle changes, and surgical…

Melatonin Dosage: How Much Melatonin to Take
Learn how much melatonin to take for sleep, including dosage for adults and children, potential…

Sleep-Related Breathing Disorders
Abnormal breathing during sleep can be a serious problem. Our introduction gives background on sleep…

Non-24-Hour Sleep Wake Disorder
Learn about the causes of non-24-hour sleep-wake disorder and who is most likely to suffer…

Napping: Benefits and Tips
Naps are a common practice around the world to restore energy during the day. Learn…

Why We Have Nightmares (And How to Prevent Them)
Nightmares can affect anyone, and when frequent, can harm sleep and daily life. Learn about…

Hypersomnia
When excessive daytime tiredness doesn’t have a known cause, it may be idiopathic hypersomnia. Our…

COVID-19 Vaccine and Sleep
Looking for the facts about COVID-19 vaccines? Learn about COVID-19 vaccine availability, safety, effectiveness, and…

Coronasomnia
Can’t sleep during the COVID-19 pandemic? You’re not alone. Learn more about coronasomnia, its symptoms,…

Chronic Fatigue Syndrome Treatments
Chronic fatigue syndrome (CFS) has no known cause or cure, but people with this illness…

Chronic Fatigue Syndrome Symptoms
Chronic fatigue syndrome symptoms can resemble other disorders. Learn how to tell if you might…

How to Stop Having Nightmares
Are nightmares interfering with your sleep? Learn what could be causing them, how to stop…

Nightmare Disorder
Most people dream for about two hours each night. The purpose of dreaming is not…

What Is Sleep Apnea?
Sleep apnea involves disrupted breathing during sleep. Learn about the types of sleep apnea as…

Is Sleep Apnea Genetic?
Certain genetic factors like anatomy and weight can increase your risk of sleep apnea. Learn…

How to Prepare for a Sleep Study
Sleep studies provide information about sleep disorders. Discover tips to prepare for a sleep study…

How to Sleep When Someone Is Snoring
Is someone’s snoring keeping you up at night? Learn why people snore, how you can…

Advanced Sleep Phase Disorder
Advanced sleep phase disorder can affect people who have a sleep schedule that runs earlier…

Why Do Older Adults Wake Up Early?
Have you wondered why older adults tend to wake up early? We discuss sleep problems…

How Much Does a Sleep Study Cost?
Wondering how much a sleep study costs? Find out why some tests are more expensive…

CPAP Titration Study
A CPAP titration study helps determine the right air pressure for sleep apnea treatment. Learn…

Sleep Apnea Self-Care
Sleep apnea self-care can help reduce symptoms and improve sleep. Learn simple home remedies and…

Can Sleep Apnea Be Cured?
Sleep apnea is often manageable but not always curable. Learn which treatments work and when…

Can Sleep Apnea Cause Headaches?
Sleep apnea headaches are a type of morning headache common in people with obstructive sleep…

Best Sleeping Position for Sleep Apnea
Have you wondered about the best sleeping position for sleep apnea? We highlight which positions…

Types of CPAP Machines
PAP therapy is the standard treatment for sleep apnea, but there are variations. Explore the…

What Is a BiPAP Machine?
A BiPAP machine uses two pressure levels to support breathing during sleep. Learn how it…

Sleep Apnea Mouth Guards
A sleep apnea mouth guard can be an effective alternative to CPAP therapy, but they’re…

EPAP Therapy: Expiratory Positive Airway Pressure
EPAP (expiratory positive airway pressure) therapy is an effective treatment for obstructive sleep apnea. Learn…

ASV Machines
Unlike CPAP machines, ASV machines dynamically adjust air pressure levels throughout the night. Learn why…

CPAP and COVID-19
Learn about how CPAP therapy is being explored as a treatment for severe COVID-19, and…

If I Snore, Do I Need CPAP?
Wondering if your snoring means that you should get a CPAP? We review how CPAPs…

How Much Does a CPAP Machine Cost?
The cost of CPAP machines vary depending on their features. We break down the costs…

CPAP Machine Side Effects
CPAP can be an effective treatment for sleep apnea, but many users experience side effects.…

How to Use a CPAP Machine
Are you about to start using a CPAP machine for sleep apnea? We outline the…

BiPAP vs. CPAP Machines
Confused about the difference between CPAP and BiPAP machines? We'll break down how these PAP…

How to Choose a CPAP Mask Based on Your Sleep Position
Learn what to look for in a CPAP mask based on your sleep position, as…

Aerophagia
If you feel bloated and gassy while on continuous positive airway pressure (CPAP) therapy, it…

CPAP Benefits
Continuous positive airway pressure (CPAP) therapy is an effective treatment for sleep apnea. Learn more…

At-Home Sleep Study
Home sleep apnea testing can be more convenient and cost-effective than in-lab testing for obstructive…

Sleep Apnea Treatment
Though CPAP therapy is the most common sleep apnea treatment, other options exist. We look…

Respiratory Rate While Sleeping
The pace of your breathing can be a window into your health, so it’s worth…

Before and After CPAP: How Your Body Changes
Starting CPAP therapy can lead to noticeable changes in how you feel, sleep, and function—sometimes…

What Conditions Can Cause Excessive Daytime Sleepiness?
Are you constantly sleepy? Our guide explains the potential causes of excessive sleepiness including sleep…

Nocturia: Frequent Urination at Night
Nocturia can disrupt sleep and signal more serious health concerns. Learn what causes nighttime bathroom…

Alcohol and Sleep
Many people rely on alcohol to help them fall asleep, but their sleep quality may…

Treatment for Excessive Sleepiness
Excessive daytime sleepiness (EDS) is a symptom of a sleep-related disorder. Learn about treatment options…

Excessive Sleepiness and Workplace Accidents
Excessive sleepiness can lead to workplace accidents. Learn how sleepiness impacts safety in the workplace…

Sleeping With Your Mouth Open
Do you sleep with your mouth open? We discuss symptoms, causes, and effects of mouth…

Apnea-Hypopnea Index (AHI)
The apnea-hypopnea index (AHI) helps diagnose obstructive sleep apnea. It measures how often your breathing…

Vertigo While Sleeping
Do vertigo and dizziness interfere with your sleep? Discover what causes vertigo, get tips for…

Valerian Root for Sleep
Valerian root is a popular herbal supplement often used to promote sleep and ease anxiety.…

Normal Sleeping Heart Rate
It is normal for your heart rate to slow down during sleep. Learn what is…

How to Become a Morning Person
Are you a night owl surrounded by early birds? We explain the science behind late…

Why Do You Drool In Your Sleep?
Drooling during sleep is normal, but excessive drooling can be caused by your sleep position,…

Why Do I Wake Up at 3 am?
Waking up during the night is common and can occur for a variety of reasons.…

Is 6 Hours of Sleep Enough?
Learn about the health impacts of getting six hours of sleep per night, and the…

Is 7 Hours of Sleep Enough?
Wondering whether seven hours meets your sleep needs? Find out how much sleep people need…

Is 5 Hours of Sleep Enough?
Do you regularly get only five hours of sleep? Find out how getting by on…

Does Sleeping Make You Taller?
Adult height is determined by a complex combination of factors, most of which are outside…

Why Do You Have Blurry Vision in the Morning?
Do you often wake up with blurry vision in the morning? Learn potential causes of…

Can You Die From Not Sleeping?
Everyone knows sleep is important, but can you die from not sleeping? Learn about the…

Why Are My Feet Hot at Night?
Do hot, burning feet keep you up at night? Learn which medical conditions can cause…

Why Do I Get So Hot When I Sleep?
Are you waking up overheated? Learn the reasons why you may be getting hot as…

Why Am I Waking Up Gasping for Air?
Waking up gasping for air can be a frightening experience. Learn about the potential causes,…

Exercise and Sleep
Sleep and exercise are closely intertwined. Learn how sleep can affect physical activity levels and…

Sleep Deprivation and Reaction Time
Losing sleep can increase reaction times, impacting performance, productivity, and safety. Learn how sleep deprivation…

Lack of Sleep May Increase Calorie Consumption
Want to learn more about the relationship between sleep and appetite? We’ll explain how sleep…

Can a Lack of Sleep Cause Headaches?
How are sleep deprivation and migraines connected? Learn how a lack of sleep may be…

Jet Lag: Symptoms, Causes, and Prevention
Worried about feeling alert and maintaining a healthy sleep schedule after a long flight? Learn…

What Is NREM Sleep?
Non-rapid eye movement (NREM) sleep is an intensely active state that encompasses various mental and…

How to Get More Deep Sleep
Wondering whether you get enough deep sleep? Find tips to get more deep sleep, facts…

What Side Should You Sleep on if You Have a Ruptured Eardrum?
A ruptured eardrum is a hole or tear in the thin membrane inside the ear…

Best Sleeping Position for Breathing Problems
Do you have shortness of breath when sleeping? Discover the best sleeping position for breathing…

What Is Green Noise and How Can It Help You Sleep?
Curious about green noise and whether it can help you sleep? We highlight what green…

Sleeping in a Tent: Tips and Gear for Comfort
Explore expert tips and essential gear for a comfortable night in a tent, including guidance…

Is Narcolepsy Genetic?
Does narcolepsy run in your family? Find out about the role of genetics in narcolepsy…

Tips for Shift Workers
Shift workers often find it challenging to balance sleep and activities with their varying shifts.…

Shift Work Disorder in the Workplace
Do you manage employees who work a shift work schedule? Read our guide to learn…

Treatments for Shift Work Disorder
Shift workers have an arsenal of tactics available to them that may help improve sleep…

Best Sleeping Positions
Are you waking up in pain? It could be your sleep position. Learn about the…

How Noise Can Affect Your Sleep Satisfaction
Noise has a major impact on sleep. Exposure to too much noise during sleep has…

Confusional Arousals and Sleep Drunkenness
Learn about confusional arousals, a type of parasomnia that causes you to behave as if…

Actigraphy
An actigraphy device tracks your movements so your doctor can analyze your sleep patterns. Learn…

Stages of Sleep: What Happens in a Normal Sleep Cycle?
Healthy sleep consists of distinct stages. We break down the defining traits of each stage…

Maintenance of Wakefulness Test (MWT)
Learn how the maintenance of wakefulness test (MWT) operates. This series of four trials is…

Epworth Sleepiness Scale
The Epworth Sleepiness Scale (ESS) is one tool that helps doctors decide whether daytime drowsiness…

What Causes Snoring in Women?
Snoring is caused by tissues in the airway vibrating as a sleeper breathes. Although snoring…

What if I Can't Sleep During a Sleep Study?
Have you ever wondered what to do if you can't sleep during a sleep study?…

Health Benefits of Sleep
Getting enough quality sleep has a lot of mental and physical health benefits. Learn how…

Heart Palpitations at Night
Heart palpitations can make you feel like your heart is racing or skipping beats. We…

How to Get Rid of Groggy Feelings After a Nap
Wondering why you wake up feeling groggy after taking a nap? We cover the effects…

What All-Nighters Do to Your Cognition
Skipping a night of sleep can impair speed and reaction times as much as alcohol…

Thyroid Issues and Sleep
Want to learn about thyroid health and sleep? Our guide discusses the relationship between thyroid…

The Relationship Between Sex and Sleep
Wondering how sleep and your sex life are related? Learn how sleep and sex can…

Dreams About Teeth Falling Out? 9 Possible Meanings
Despite common theories involving death and loss, dreams about losing your teeth are likely more…

Nosebleeds While Sleeping
Nosebleeds are common and can occur at night. Learn how to treat and prevent nighttime…

How Much Deep Sleep Do You Need?
Deep sleep gives your body a chance to repair and regenerate and leaves you refreshed…

Waking Up With a Dry Throat
Wondering why you keep waking up with a dry throat? Learn the possible causes, treatment…

Circadian Rhythm Fasting
Learn about circadian rhythm fasting, a type of intermittent fasting in which a person eats…

Is Eating Before Bed Bad?
Have you wondered how eating before bedtime affects your body? We break down the benefits…

Nocturnal Panic Attack
Are you experiencing nocturnal panic attacks? Learn about the symptoms of panic attacks, what causes…

How to Sleep Better with GERD
Is acid reflux interrupting your sleep? Learn how GERD can disrupt sleep, and what steps…

Fibromyalgia and Sleep
Want to learn more about how fibromyalgia impacts sleep and vice versa? Our guide includes…

Lack of Sleep and Diabetes
This guide to diabetes and sleep discusses common sleep problems, consequences of sleep deprivation, and…

Cancer and Sleep
Cancer and sleep have a complex and multifaceted relationship. Learn how sleep can affect cancer…

Is CBD a Safe and Effective Sleep Aid?
Many people claim CBD improves their sleep. Learn what CBD is, how it might help…

Hypoglossal Nerve Stimulation
An alternative to CPAP, hypoglossal nerve stimulation involves an implanted device that can improve the…

Can You Take Melatonin While Pregnant?
Up to 80% of pregnant women have insomnia, but melatonin supplements might not be a…

Leg Cramps at Night: Tips to Reduce Discomfort
Have you lost sleep because of leg cramps at night? Learn some of the potential…

Numbness in Hands While Sleeping
Waking in the night with a numb hand can be uncomfortable and can compromise the…

Excessive Yawning: What Does It Mean and How to Treat It
All vertebrate animals yawn, but yawning too much can be a sign of a sleep…

Do Melatonin Sleep Patches Help You Fall Asleep?
Melatonin patches are a type of adhesive patch you apply to your skin before you…

Benign Neonatal Sleep Myoclonus
Benign neonatal sleep myoclonus is a rare sleep-related movement disorder that occurs in very young…

Gaba for Sleep
GABA supplements are advertised to help with various health problems. Learn about how GABA works…

Finding Reputable Sleep Supplements
Many people take supplements every day but may be unaware that they are not regulated…

CBN for Sleep
Are you considering using CBN for sleep? Learn the science behind cannabinol, how it compares…

How Long Does Melatonin Take to Work?
Melatonin comes in pills, gummies, patches, and more. When choosing a supplement, it helps to…

Can Melatonin Cause Nightmares?
Many people do not get enough sleep or get poor-quality sleep. As a result, they…

Is It Safe to Take Melatonin Every Night?
Have you ever wondered if it is safe to take melatonin every night? We cover…

Treatment for a Blocked Nose at Night
A stuffy nose from nasal congestion can reduce the quality of your sleep. Learn how…

Mirtazapine for Sleep
Learn how the antidepressant drug mirtazapine affects sleep as well as its benefits and downsides…

Is Melatonin Bad for You?
Wondering if melatonin could be bad for you? We discuss when to be cautious about…

Normal Oxygen Levels While Sleeping
Do you track your overnight blood oxygen levels? We discuss normal and low blood oxygen…

Sleep Vitamins
Looking for a naturally inspired way to sleep better? Learn which vitamins are considered best…

Obstructive Sleep Apnea
Obstructive sleep apnea is a condition marked by abnormal nighttime breathing. Learn more about the…

Paroxysmal Nocturnal Dyspnea
Paroxysmal nocturnal dyspnea is a shortness of breath during sleep that comes on suddenly. Learn…

Technology in the Bedroom
Technology in the bedroom can be a major barrier to sleep. Creating a technology-free environment…

Blue Light: What It Is and How It Affects Sleep
Many people use electronics before bedtime, but this may have a negative effect on sleep.…

Hypercapnia
Hypercapnia refers to a buildup of carbon dioxide in the bloodstream, which can happen due…

Does Sleeping Sitting Up Help Sleep Apnea?
Does your sleep apnea get worse when you sleep on your back? We go over…

Humidifiers and Sleep
Do you experience discomfort while sleeping due to dry air? Learn how using a humidifier…

What’s the Connection Between Race and Sleep Disorders?
The burden of sleeping problems falls more heavily on people of color. Our guide explores…

Hypnopompic Hallucinations
Hypnopompic hallucinations are generally harmless hallucinations that occur as a person wakes up. They're more…

Long Sleepers
Long sleepers habitually sleep more hours per night than people in their age group. Learn…

Paradoxical Insomnia: The Misperception of Your Sleep State
Paradoxical insomnia can cause people to believe they haven't slept well, even after a full…

Does Your Oxygen Level Drop When You Sleep?
Blood oxygen levels may drop if a person has a sleep disorder or other medical…

REM Sleep: What It Is and Why It's Important
REM sleep is known for dreaming, but much more happens during this critical sleep stage.…

Healthy Sleep Habits
This is real, actionable advice you need to improve your sleep, not the generic tips…

Paradoxical Sleep
Paradoxical sleep is another name for rapid eye movement (REM) sleep. Learn about this sleep…

Hypopnea
Concerned about hypopnea? Learn more about this common symptom of sleep-related breathing disorders, like sleep…

Banana Tea: Recipe and Benefits for Sleep
Learn about the sleep-promoting nutrients in banana tea and how to prepare this healthy and…










