We all feel tired sometimes, but roughly 20 percent of the population can be classified as having Excessive Sleepiness (sometimes referred to as Excessive Daytime Sleepiness).

Obstructive sleep apnea sufferers often experience excessive daytime sleepiness(EDS). Find out more about this condition and treatment options.

Insomnia is a common sleep problem for adults. The National Institutes of Health estimates that roughly 30 percent of the general population complains of sleep disruption.

Shift work disorder is a chronic condition that is directly related to a person’s work schedule.

Non-24-Hour Sleep Wake Disorder (Non-24) is a disorder that affects the normal 24-hour synchronization of circadian rhythms.

From catnaps to cataplexy, this all-inclusive guide will teach you every thing you wanted to know about narcolepsy.

Approximately one in ten adult Americans suffer from Restless Legs Syndrome (RLS), also known as Willis-Ekbom Disease.