Hypersomnia / Daytime Sleepiness Directory
Hypersomnia/daytime sleepiness is episodes of excessive sleepiness during the day. Follow the links below to find WebMD's comprehensive coverage about how hypersomnia/daytime sleepiness occurs, how it's diagnosed, how to treat it, and much more.
Sleep and Hypersomnia
WebMD looks at the condition called hypersomnia, characterized by excessive daytime sleepiness.
Learn more from WebMD about hypersomnia, a condition that causes excessive drowsiness during the day.
Medical Causes of Excessive Sleepiness
Could sleep apnea or another medical condition be causing your sleepiness? WebMD looks at various medical conditions that disrupt your sleep, and what to do about them.
Causes of Extreme Fatigue and Exhaustion
WebMD helps you recognize when being tired goes beyond what's considered normal. Learn about conditions associated with fatigue.
Fighting Off Sleepiness: Myths and Facts
Sleepiness affects the daily activities of 40% of Americans, say sleep exerts at Stanford University. No wonder we cling to so many fallacies about how to get by on little sleep. But what really works? What’s just a myth? Here are the facts.
Sleep Loss and Depression
Lack of sleep and depression often go together. And treating one can help treat the other.
What's Causing You to Be Sleepy?
Are you sleepy all the time? Find out what could be causing your excessive sleepiness, from working shifts to an underlying sleep disorder.
12 Tips to Avoid Daytime Sleepiness
The problem of daytime sleepiness usually starts at night. Use this checklist of ways to improve nighttime sleep and avoid daytime sleepiness.
Slideshows & Images
Slideshow: Fighting Fatigue and Sleepiness on the Road
See the surprising dangers of driving sleepy. Learn what increases your risk of a car accident and tips to keep you safe whether it is insomnia, narcolepsy, or something else making you tired.
Slideshow: A Visual Guide to Sleep Disorders
Pictures show you the symptoms, causes, tests, and treatments for sleep problems.