Obstructive sleep apnea and snoring occur when tissues of the upper airway, tongue, and throat relax during sleep. This relaxation can obstruct and vibrate the airway, making breathing difficult. This video discusses an effective treatment for sleep apnea, a device that provides continuous positive airway pressure.

Delayed sleep phase syndrome (DSPS) refers to someone who is an extreme “night owl.” A person with this syndrome feels most alert at the end of the day, when most other people are ready to turn in. In this video, you'll learn about your internal body clock and its effect on the sleep-wake cycle.

Narcolepsy is a chronic sleep disorder in which a person typically becomes sleepy or falls asleep, often at inappropriate times. This disorder may run in families and may begin at any age. In this video, you'll find out how narcolepsy develops, symptoms to watch for, and available treatments.

Obstructive sleep apnea (OSA) is a common problem that affects more people than diabetes or asthma. Untreated, OSA can lead to serious health problems, including high blood pressure and heart failure. This video gives an overview of OSA and how it is treated.

Parasomnias are disorders that disrupt sleep. If you walk or talk in your sleep or toss while dreaming, you probably have a parasomnia. These behaviors can wake you up partially or fully or disturb the sleep-stage transition. This video explains the different types of parasomnias and what to do if you have one.

Periodic limb movements of sleep (PLMS) is a sleep disorder characterized by uncontrolled, repeated movements in the lower limbs during sleep. A person with this disorder may not be aware of it and simply feel tired the next day. This video explores the possible causes and typical symptoms of PLMS.

Insomnia is defined as a difficulty falling asleep and/or maintaining sleep. It is a symptom, not a disorder. This video explores medical conditions and experiences that can cause insomnia and what your doctor may recommend for a good night's sleep.

Stress is a part of life, but chronic stress can lead to health problems. Relaxation exercise can help you counteract the negative effects of stress. This video discusses the importance of learning to relax and different relaxation techniques you can try.

Restless legs syndrome (RLS) is an unpleasant sensation that occurs while sitting or lying still, especially before or at bedtime. People with RLS describe a tingling, creepy-crawly, burning, or restless feeling in their legs. This video discusses possible causes of RLS and what you can do to minimize symptoms.

A child with obstructive sleep apnea (OSA) has a partial or complete blockage of the airways during sleep, which causes pauses in breathing. This video explains who is at risk for OSA—it's most common between ages 2 and 7—and what you can do as a parent.

Sleep hygiene refers to lifestyle habits that encourage a good night's sleep. These include sticking to a regular sleep schedule and setting up a relaxing environment before bedtime. This video explains why sleep hygiene is important and offers suggestions on how to improve yours.

A sleep study, also called a polysomnogram, is an overnight study of your sleep. This study takes place in a specialized lab and is designed to detect problems with your sleep. In this video, you'll find out what to expect during your night in the sleep lab.