PREVIOUS QUESTION:

 

NEXT QUESTION:

 

What can cause sleepiness?

ANSWER

Not getting enough sleep is the most common cause of sleepiness. Working at night and sleeping during the day is another. Other causes include drug, alcohol, or cigarette use, lack of physical activity, obesity, and the use of certain medications. But nodding off when you want or need to be awake may also be caused by a health condition, like depression or a sleep disorder -- such as restless legs syndrome, sleep apnea, or narcolepsy.

SOURCES: 

News release, FDA.

National Institute of Neurological Disorders and Stroke: “NINDS Hypersomnia Information Page.”

Medscape: “Management of Excessive Daytime Sleepiness Reviewed.”

eMedicine: “Primary Hypersomnia.” 

eMedicine: “Obstructive Sleep Apnea.” 

eMedicine: “Disorders that Disrupt Sleep (Parasomnias).”

National Sleep Foundation: “Fatigue and Excessive Sleepiness.”

National Sleep Foundation: “Depression and Sleep.”

Narcolepsy Network: “FAQ.”

RLS Foundation: “What Is RLS?” 

RLS Foundation: “FAQ.”

Reviewed by Jennifer Robinson on January 19, 2017

SOURCES: 

News release, FDA.

National Institute of Neurological Disorders and Stroke: “NINDS Hypersomnia Information Page.”

Medscape: “Management of Excessive Daytime Sleepiness Reviewed.”

eMedicine: “Primary Hypersomnia.” 

eMedicine: “Obstructive Sleep Apnea.” 

eMedicine: “Disorders that Disrupt Sleep (Parasomnias).”

National Sleep Foundation: “Fatigue and Excessive Sleepiness.”

National Sleep Foundation: “Depression and Sleep.”

Narcolepsy Network: “FAQ.”

RLS Foundation: “What Is RLS?” 

RLS Foundation: “FAQ.”

Reviewed by Jennifer Robinson on January 19, 2017

NEXT QUESTION:

How does sleep apnea lead to excessive sleepiness?

WAS THIS ANSWER HELPFUL

"ALEXA, ASK WEBMD"

THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

    This tool does not provide medical advice. See additional information.