Learn the symptoms of four common sleep disorders.

See if your symptoms signal a sleep disorder.

Wake up refreshed? Always alert? If not, you may have a sleep disorder.

There are a variety of symptoms associated with insomnia, some of which can also occur with certain medical conditions. Learn more here.

Learn about six common sleep apnea symptoms.

Feel tingling or "crawling" sensations deep within your legs? Find out if your symptoms may be restless legs syndrome.

Narcolepsy is characterized by four general symptoms. Find out what they are.

When the sleep-wake cycle goes awry, it affects the whole body. Check out these nine symptoms.

People with this mysterious disorder are often violent. Find out more.

Find out more about the leg movements associated with this sleep disorder.

You may be grinding your teeth during sleep. Find help.

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

Night terrors are more than bad nightmares. Find out how to tell the difference.

Some bedwetting symptoms suggest a psychological or medical problem. Learn more here.

Find out when you should consult a doctor about insomnia.

Is it time to see your doctor about snoring? Find out here.

Your “body clock” is off -- should you tell your doctor?

Lack of sleep affects children in many ways. Learn to spot the problem.

Learn when sleepwalking needs medical attention.

Is your child having frequent night terrors? It may be time to see the pediatrician.

Find out when kids’ bedwetting may be cause for concern.

Check if kids’ bedwetting merits a doctor’s attention.

Learn the hallmarks and causes of insomnia.

Learn about sleep apnea’s types, risk factors, and dangers.

Get details on restless legs syndrome, which affects about 10% of Americans.

Get detailed information, including causes, on this sleep disorder that commonly occurs with restless legs syndrome.

What causes snoring? Is snoring bad for your health? Find out.

Have intense cravings to eat late at night? Wake up at night to eat? Find out what may be going on.

Spot the seven risk factors of excessive daytime sleepiness (hypersomnia).

Find out why people grind their teeth and how to prevent it.

Get information on narcolepsy’s symptoms and causes.

Jet lag, shift work, and crazy hours can wreak havoc on your body clock.

Good REM sleep is key. Find out what can disrupt this vital stage of sleep.

Alcohol and some drugs can hamper your sleep. Get the facts.

Learn about 15 disruptive sleep-related disorders (parasomnias).

Learn what causes sleepwalking. Is it your genes, bad health, drugs, or stress?

Learn what causes nightmares and when to see your doctor.

Night terrors affect up to 6% of kids. Get the facts, including causes and symptoms.

Learn why kids wet their beds and about the types of bedwetting.