Sleepy All Day
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Try one of these related symptoms.
Excessive daytime sleepiness
Excessive tiredness during daytime
Tired all the time
Feeling tired and sleepy all of a sudden
All of a sudden feeling sleepy
Experiencing a sudden onset of sleepiness in the middle of an activity
Daytime tiredness
Sleepy at noon
Sleeping too much during the day
Suddenly feeling extremely drowsy
Drowsy during the day
About the Symptom
Daytime somnolence is defined as the inability to maintain wakefulness during waking hours, resulting in unplanned periods of sleep. This can be due to poor sleep at night secondary to poor sleep hygiene, insomnia, or sleep apnea or due to an inherent sleep disorder such as narcolepsy.
When to See a Doctor
Seek professional care if you experience any of the following symptoms
- Excessive sleepiness in the day
Possible Causes
Generally, Sleepy all day can be related to:
- Narcolepsy
Narcolepsy is a chronic sleep disorder causing excessive daytime drowsiness. The cause is unclear but may involve genetic factors and abnormal nerve cell signaling in the brain. In addition to daytime sleepiness, symptoms include sudden sleep attacks, loss of muscle tone, and, occasionally, hallucinations when awaking from sleep in the the morning.
- Sleep Apnea Syndrome
A group of sleep disorders where breathing repeatedly abnormally slows or stops . It may be caused by physical obstruction of the airway, abnormal brain signaling or a mixture of both. Symptoms include snoring, choking during sleep, daytime drowsiness and morning headaches. If left untreated, it also increases the risk of developing cardiovascular diseases like heart attack, stroke and kidney failure.
- Sleep Disorder
Sleep disorders are conditions that affect the quality, timing, or duration of your sleep, impacting your ability to function when you're awake. There are many types of sleep disorders, including disturbances in sleep quality or quantity, excessive daytime sleepiness, abnormal behaviors during sleep, sleep disorders related to mental disorders, and more.
- Sleep Deprivation
- Chronic Fatigue Syndrome
- Pregnancy
Related Serious Diseases
Sometimes, Sleepy all day may be related to these serious diseases:
- Meningitis
Meningitis is an inflammation of the fluid and membrane (meninges) surrounding the brain and spinal cord usually caused by bacterial or viral infections, brain injuries, cancer, and certain drugs. It is a medical emergency that can lead to permanent brain and nerve damage.
- Dehydration
- Encephalitis / Encephalopathy
- Carbon Monoxide Poisoning
Doctor's Diagnostic Questions
Your doctor may ask these questions to check for this symptom:
- Do you often feel excessively sleepy during the day?
- When did you first notice your excessive daytime sleepiness?
- How often do you experience excessive daytime sleepiness?
- How severe is your excessive daytime sleepiness?
- Do you have episodes of sudden, overwhelming daytime sleepiness?
Reviewed By:
Eric A. Gantwerker, MD, MMSC (Otolaryngology (ENT))
Pediatric Otolaryngologist at Northwell Health and Associate Professor of Otolaryngology at Zucker School of Medicine at Hofstra/Northwell. He holds a Master of Medical Science (MMSc) in Medical Education with a special focus on educational technology, educational research, and game-based learning from Harvard Medical School and a Master of Science in Physiology and Biophysics from Georgetown University. He has a special interest in faculty development and has been a speaker or faculty at hundreds of local, national, and international courses and conferences. He is also an active blogger and podcaster for several organizations, including the Harvard Macy Institute (HMI), Harvard Medical School CME Online, and BackTable Innovations. He has been featured in the news and print for media outlets such as USA Today, Businesswire, The Washington Post, Nature Medicine, Fox News, and KevinMD. He was also the Vice President, Medical Director of a medical video game company, Level Ex from 2018 to 2023 that utilized game technology and psychology to create interactive experiences for healthcare professionals. | He is recognized as an expert on the implementation of educational technologies and gaming with a foundation in educational theory for health professions education. He was honored to be inducted as an Associate Member of the American College of Surgeons (ACS) Academy of Master Surgeon Educators and as an Associate Fellow of the Association for Medical Education in Europe (AMEE).
Rohini R, MD (Otolaryngology (ENT))
Dr. Rohini R is an ENT, Head and Neck Surgeon, with a Fellowship in Advanced Endoscopic Sinus and Skull Base Surgery and a Fellowship in Aesthetic Medicine and Lasers. Besides clinical practice and working with Ubie, she is actively training and mentoring medical students and residents. She has functioned in various work settings - teaching hospitals, private and free health centers, and worked with patients from all socioeconomic backgrounds due to her experience in free hospitals and volunteering in India and Singapore.
Content updated on Feb 6, 2025
Following the Medical Content Editorial Policy
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FAQs
Q.
What are the possible causes of daytime sleepiness in women?
A.
Daytime sleepiness in women can be caused by a variety of things like iron deficiency, diabetes, menopause, depression, pregnancy, sleep apnea syndrome or simply overexertion and stress.
References:
Rosenthal TC, Majeroni BA, Pretorius R, Malik K. Fatigue: an overview. Am Fam Physician. 2008 Nov 15;78(10):1173-9. PMID: 19035066.
Cahill CA. Differential diagnosis of fatigue in women. J Obstet Gynecol Neonatal Nurs. 1999 Jan-Feb;28(1):81-6. doi: 10.1111/j.1552-6909.1999.tb01968.x. PMID: 9924868.
Ellingson LD, Kuffel AE, Vack NJ, Cook DB. Active and sedentary behaviors influence feelings of energy and fatigue in women. Med Sci Sports Exerc. 2014 Jan;46(1):192-200. doi: 10.1249/MSS.0b013e3182a036ab. PMID: 23783259.
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Link to full study:
https://www.medrxiv.org/content/10.1101/2024.08.29.24312810v1References
Sleep Apnea - Mayo Clinic
https://www.mayoclinic.org/diseases-conditions/sleep-apnea/symptoms-causes/syc-20377631#:~:text=Sleep%20apnea%20is%20a%20potentially,you%20might%20have%20sleep%20apnea.Daytime Somnolence - American Association of Family Physicians (AAFP)
https://www.aafp.org/pubs/afp/issues/2009/0301/p391.htmlManaging Daytime Fatigue - Sleep Foundation
https://www.sleepfoundation.org/excessive-sleepiness