Sleep Apnea - What Is Sleep Apnea?

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class="research-info-link"> <i class="fas fa-microscope"></i> <a href="/research/sleep-apnea"> Research </a> </div> </div> </div> </div> </div> </div> <div class="layout__region layout__region--second"> <div class="field field--name-field-health-topic node-theme-blue field__item block block-nhlbi-health-topics block-nhlbi-health-topics-book-name"> <div>Sleep Apnea</div> </div> <div class="block block-layout-builder block-field-blocknodehealth-topicstitle"> <h1 class="field field--name-title field--type-string field--label-hidden responsive-container responsive-container-constrained field__item"><span class="ht-kicker">Sleep Apnea </span>What Is Sleep Apnea?<hr> </h1> </div> <div class="block block-addtoany block-addtoany-block"> <div class="responsive-container responsive-container-constrained"> <span class="a2a_kit a2a_kit_size_24 addtoany_list" data-a2a-url="https://www.nhlbi.nih.gov/health/sleep-apnea" data-a2a-title="What Is Sleep Apnea?"> <a class="a2a_dd addtoany_share" href="https://www.addtoany.com/share#url=https%3A%2F%2Fwww.nhlbi.nih.gov%2Fhealth%2Fsleep-apnea&title=What%20Is%20Sleep%20Apnea%3F"> <img src="/themes/custom/nhlbi/images/share-alt-icon.svg" alt="Share"> </a> <a class="a2a_button_email"></a> <a class="a2a_button_print"></a> </span> </div> </div> <div class="language-switcher-language-url block block-language block-language-blocklanguage-content" role="navigation"> <div class="responsive-container responsive-container-constrained"><h2 class="visually-hidden" aria-label="Switch to Espanol">Language switcher</h2><ul class="links"><li hreflang="en" data-drupal-link-system-path="node/93139" class="is-active" aria-current="page"><a href="/health/sleep-apnea" class="language-link is-active" hreflang="en" data-drupal-link-system-path="node/93139" aria-current="page">English</a></li><li hreflang="es" data-drupal-link-system-path="node/93139"><a href="/es/salud/apnea-del-sueno" class="language-link" hreflang="es" data-drupal-link-system-path="node/93139">Espa帽ol</a></li></ul> </div> </div> <div class="block block-layout-builder block-field-blocknodehealth-topicsfield-component-page-links"> </div> <div class="block block-layout-builder block-field-blocknodehealth-topicsfield-component-sections"> <div class="field field--name-field-component-sections field--type-entity-reference-revisions field--label-hidden"> <div class='field__items'> <div class="paragraph component component-section component-theme-white component-section-theme-white component-section-node-theme- paragraph--type--component-section paragraph--view-mode--default"> <div class="responsive-container responsive-container-constrained"> <div class="field field--name-field-component-section-content field--type-text-long field--label-hidden clearfix field__item"><p>Sleep apnea is a common condition that occurs when your breathing stops and restarts many times while you sleep. This can prevent your body from getting enough oxygen. If someone tells you that you snore or gasp for air during sleep, you may want to talk to your healthcare provider. You may also want to ask your provider about sleep apnea if you experience other <a href="/health/sleep-apnea/symptoms">symptoms</a> of poor sleep quality, such as excessive daytime sleepiness.</p><p>There are two types of sleep apnea.</p><ul><li><strong>Obstructive sleep apnea</strong>, also called OSA, happens when your upper airway becomes blocked many times while you sleep. The blockage can reduce or completely stop airflow. This is the most common type of sleep apnea. Factors such as <a href="/health/overweight-and-obesity">obesity</a>, large tonsils, or changes in your  <span data-entity-type="node" data-entity-uuid="662d4b0d-f3ca-4b94-a41a-7b9ec0ce1bde" data-embed-button="node" data-entity-embed-display="entity_reference:entity_reference_entity_view" data-entity-embed-display-settings="{"view_mode":"default","data-glossary-capitalization":"none","data-glossary-plural":"none","data-glossary-style":"0|0|0"}" data-langcode="en" class="entity-embed-glossary_term embedded-entity"> <a class="glossary-term" href="#" title="Definition of hormone " alt="Definition of hormone" data-term="hormone" data-pronunciation="HOR-moan" data-definition="Substance made in glands throughout the body. Hormones are released into the blood to travel throughout the body to control other body functions." role="link"> hormone </a> </span>  levels can narrow your airway. Any of these factors could increase <a href="/health/sleep-apnea/causes-and-risk-factors">your risk</a> for obstructive sleep apnea.</li><li><strong>Central sleep apnea</strong> occurs when your brain does not send the signals needed to breathe. Health conditions that affect how your brain controls your airways and chest muscles can cause central sleep apnea.</li></ul> <figure class="align-right b-loaded caption caption-img "> <div class="embed-video-container embed-video-text-container-disabled align-"> <div class="field field--name-field-video-url field--type-video-embed-field field--label-hidden field__item"><div class="video-embed-field-provider-vimeo video-embed-field-responsive-video"><iframe width="854" height="480" frameborder="0" allowfullscreen="allowfullscreen" title="What is sleep apnea?" src="https://player.vimeo.com/video/1045768883?autoplay=0"></iframe> </div> </div> </div> <figcaption><em>What is sleep apnea? Learn about the symptoms and health effects of untreated sleep apnea.</em></figcaption> </figure> <p>To <a href="/health/sleep-apnea/diagnosis">diagnose sleep apnea</a>, your provider may have you do a sleep study. Breathing devices, such as continuous positive air pressure (CPAP) machines, and lifestyle changes are common sleep apnea <a href="/health/sleep-apnea/treatment">treatments</a>. If these treatments do not work, your provider may recommend surgery to correct the problem that is causing your sleep apnea. If your sleep apnea is not diagnosed or treated, you may not get enough quality sleep. This can lead to issues with concentrating, making decisions, remembering things, or controlling your behavior. Untreated sleep apnea increases the risk for <a href="/health/stroke">stroke</a>, <a href="/health/heart-attack">heart attack</a>, and other <a href="/health/sleep-apnea/living-with">serious problems</a>.</p><p>About 50 to 70 million Americans have a sleep disorder. To learn about NHLBI sleep research and find more sleep-related information, visit the <a href="/health-topics/education-and-awareness/sleep-health">Sleep Health Education and Awareness pages</a>.</p></div> </div> </div> </div> </div> </div> <div class="block block-nhlbi-health-topics block-nhlbi-book-nav-block"> <nav id="book-navigation-93138" class="book-navigation responsive-container-constrained" role="navigation" aria-labelledby="book-label-93138"> <h3 class="visually-hidden" id="book-label-93138">Book traversal links for What Is Sleep Apnea?</h3> <ul class="book-pager"> <li class="book-pager__item book-pager__item--next"> <h4 class="nav-label">Next</h4> <a href="/health/sleep-apnea/symptoms" rel="next" title="Go to next page">Symptoms <i class="fas fa-angle-right"></i></a> </li> </ul> </nav> </div> </div> </div> <div class="layout layout--onecol"> <div class="layout__region layout__region--content"> <div class="block block-layout-builder 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