The amount of sleep a person needs depends on many factors, including age.

Sleep stages are divided into non-rapid eye movement (non-REM) and rapid eye movement (REM).

We all dream -- even if we don't remember it the next day. But why do we dream? And what do dreams mean, anyway?

Sleep hygiene is a combination of sleeping conditions and lifestyle habits that help you get consistent, uninterrupted sleep.

Learn about your sleep patterns and habits by keeping a daily sleep diary. It may be key to diagnose and treat a sleep disorder.

Insomnia is a sleep disorder that is characterized by difficulty falling and/or staying asleep.

Hypersomnia, or excessive sleepiness, is a condition in which a person has trouble staying awake during the day.

Xywav is the only liquid medicine approved to treat both narcolepsy and idiopathic hypersomnia. which is safe and effective for adults.

Parasomnias are disruptive sleep disorders that can occur during arousals from REM sleep or partial arousals from non-REM sleep.

With REM sleep behavior disorder, the paralysis that normally occurs during REM sleep is incomplete or absent.

Circadian rhythm disorders are disruptions in a person's circadian rhythm -- a name given to the "internal body clock."

Non-24-hour sleep-wake disorder is a specific kind of circadian rhythm disorder that is particularly common among blind people.

Periodic limb movement disorder (PLMD) is a sleep disorder characterized by rhythmic movements of the limbs during sleep.

Narcolepsy is a neurological disorder that affects the control of sleep and wakefulness.

 Bedwetting is most often a developmental issue. Most kids simply outgrow it and never need treatment.

When you wake up terrified from a disturbing nightmare, you might think you're the only adult who has them.

Sleepwalking symptoms aren’t as obvious as they may seem. Get the details here.

Have you ever felt like you were awake but unable to move? This condition is called sleep paralysis.

When you fly across several time zones in a matter of hours, you’re moving faster than your body’s internal clock can adjust.

Most people probably grind and clench their teeth during sleep sometimes. Occasional teeth grinding doesn't usually cause harm.

Oversleeping has been linked to a host of medical problems, including diabetes, heart disease, and increased risk of death.

Sleep-related eating disorders are characterized by abnormal eating patterns during the night.

Learn about some of the most common sleep disorders.

Your partner may not be the only one missing out on a good night's rest. More than likely, your sleep is being affected, too.

What is the connection between sleep and your body's defense against illness and infection? It works both ways.

If high levels of unwanted stress are not properly managed, your health and sense of well-being can suffer.

The hormonal changes and physical discomforts associated with pregnancy can affect a pregnant woman's quality of sleep.

Regardless of your age, good restorative sleep is essential to physical health and emotional well-being.

Learn about specific sleep problems and steps in treating and diagnosing sleep problems.

People with insomnia may have an imbalance of substances in the brain that cause them to feel awake compared to those that make them feel sleepy.Quviviq is known as an “orexin receptor antagonist.” It blocks the wakeful effect of orexins, which leads to more sleep.

People with obstructive sleep apnea (OSA) or narcolepsy can feel very sleepy during the daytime. Sunosi helps you feel more awake. It increases the levels of two substances in the brain called norepinephrine and dopamine, but the exact way it works is not known. 

A clinical trial is a program that tests the effectiveness and safety of various interventions in people with sleep disorders.

A sleeping pill may be effective at ending your sleep problems short-term.