Insomnia is not defined by the number of hours of sleep a person gets or how long it takes to fall asleep. Individuals vary normally in their need for, and their satisfaction with, sleep. Insomnia may cause problems during the day, such as tiredness, a lack of energy, difficulty concentrating, and irritability. Read More
Loud, constant snoring can indicate a potentially life-threatening disorder called obstructive sleep apnea. A person with sleep apnea stops breathing repeatedly while sleeping, anywhere from 10 seconds to 3 minutes. Learn More.
The main characteristic of narcolepsy is excessive and overwhelming daytime sleepiness, even after adequate nighttime sleep. A person with narcolepsy is likely to become drowsy or to fall asleep, often at inappropriate times and places. Learn More.
People with circadian rhythm sleep disorders are unable to sleep and wake at the times required for normal work, school, and social needs. They are generally able to get enough sleep if allowed to sleep and wake at the times dictated by their body clocks. Unless they also have another sleep disorder, the quality of their sleep is usually normal. Learn More.
Restless Legs Syndrome (RLS) is a neurological disorder in which patients experience irrepressible sensations in the legs or arms while sitting or lying still. Terms used to describe RLS may include creepy, crawly, pulling, tingling, itching, or gnawing. Learn More.
Periodic Limb Movement Disorder (PLMD), formerly known as nocturnal myoclonus, is a condition in which a person’s legs or arms twitch or move involuntarily and periodically during sleep. PLMD is not the same as night muscle spasms, or hypnic jerks, that occasionally occur when a person is falling asleep. Learn More.