Excessive Daytime Sleepiness: Causes, Symptoms, and Treatment
Medically reviewed by Sumiran Racherla, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Excessive Daytime Sleepiness?
A sleep medicine doctor, a doctor who treats sleep problems, often looks into excessive daytime sleepiness. Your regular doctor may first ask about health problems or medicines that could cause it. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is excessive daytime sleepiness?
Excessive daytime sleepiness means feeling more sleepy than normal during the day. It is also called hypersomnia.
People with it fall asleep again and again during the day. This is different from feeling tired all the time.
Someone who is drowsy may fall asleep when they do not want to. This can lead to safety concerns.
Symptoms
If you have this problem, you may:
- Nap often during the day.
- Fall asleep during the day.
- Still sleep for long hours at night.
Some signs point to a sleep disorder, a problem that disturbs normal sleep. These include frequent naps and falling asleep at the wrong times.
Loud snoring, snorting, gasping, or choking sounds during sleep are also signs, and a bed partner may notice them.
Causes and who gets it
Sleepiness with no known cause may be a sign of a sleep disorder. Sleep apnea (breathing that stops and starts during sleep) and narcolepsy (a brain and nerve sleep disorder) are two examples.
Other causes of drowsiness include:
- Long-term pain.
- Diabetes.
- Long work hours or shift work.
- Insomnia and other trouble falling or staying asleep.
- Not sleeping long enough.
- An underactive thyroid.
- Medicines such as sleeping pills, antihistamines, and some painkillers.
Depression, anxiety, stress, and boredom can add to sleepiness. Too much alcohol and drug use can also cause it.
Some people who feel tired during the day have a true sleep disorder. Others simply do not get enough sleep.
How doctors diagnose it
Your provider will ask about your sleep patterns and health. They may ask whether you snore. They may also ask if you fall asleep when you do not plan to nap.
A doctor may ask you to keep a diary of when you sleep. You may be sent to a doctor who specializes in sleep disorders.
Tests that may be done include:
- Blood tests, such as blood sugar, calcium, and thyroid hormone levels.
- A CT or MRI scan of the head.
- An EEG, a test that records brain waves.
- Sleep studies.
A sleep study usually records brain waves, eye movements, breathing rate, and heart rate during a full night of sleep. Other types check how quickly you fall asleep during daytime naps.
Treatment
Treatment depends on the cause. For some people it may include medicine to help keep you awake.
If a medicine is the cause, talk with your provider about switching or stopping it. Do not stop or change a medicine without first talking to your provider.
Changing sleep habits may not cure the problem, but it might help you feel better. Try to:
- Go to bed at the same time every night.
- Avoid alcohol and caffeine.
- Create a peaceful sleeping environment.
- Avoid working late into the night.
For sleep apnea, treatment may include a CPAP machine, which blows air through a mask to keep the airway open.
When to see a doctor
See a doctor if you often fall asleep during the day. Also see one if sleepiness is affecting your life.
Do not drive when you are drowsy.
Call 911 or go to the emergency room if a person has a sudden change in mental status, such as confusion or being hard to wake.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Such a doctor can go over your sleep habits and medicines, order basic tests, and refer you to a sleep specialist.
Common questions
Is excessive daytime sleepiness the same as being tired?
No, it is different from feeling tired all the time. People with it may nap often and fall asleep during the day.
Can medicines cause daytime sleepiness?
Yes, some medicines can. Talk with your provider before you stop or change any medicine.
Is it safe to drive when I am very sleepy?
No, you should not drive when you are drowsy. Drowsy people may fall asleep when they do not want to, which can lead to safety concerns.
Does daytime sleepiness mean I have a sleep disorder?
Not always. Some people have a true sleep disorder, while others simply do not get enough sleep. A provider can look for the cause.
Sources
- MedlinePlus - Drowsiness
- NHS - Excessive daytime sleepiness (hypersomnia)
- MedlinePlus - Sleep Disorders
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
