{"id":193682,"date":"2026-07-11T19:44:51","date_gmt":"2026-07-11T12:44:51","guid":{"rendered":"https:\/\/srv1860389.hstgr.cloud\/?p=193682"},"modified":"2026-07-11T19:44:55","modified_gmt":"2026-07-11T12:44:55","slug":"cpap-pressure-too-high-too-low-causes-fixes","status":"publish","type":"post","link":"https:\/\/www.nksleepcare.com\/en\/cpap-pressure-too-high-too-low-causes-fixes\/","title":{"rendered":"Feeling constipated while using CPAP? Learn about EPR\/Flex to help you exhale more easily."},"content":{"rendered":"<h1 class=\"wp-block-heading\">Experiencing discomfort when exhaling while using a CPAP machine? Learn about the EPR\/Flex function, which helps relax your breathing for a more comfortable sleep.<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Did you wake up in the middle of the night feeling like your CPAP machine was blowing air against your throat, making it hard to breathe? This is very common for new users. Many people experience this problem. <strong>Difficulty exhaling <\/strong><strong><br><\/strong><strong>CPAP blows air at high speed.<\/strong> It can be exhausting to finally fall asleep with a sleeping mask on, making you reluctant to wear one at night. This problem can be solved. Today, we&#039;ll delve into the root cause and introduce you to hidden functions you may not have used before, so you can get back to enjoying a full night&#039;s sleep.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Why do I feel uncomfortable when exhaling while using a CPAP machine?\u00a0<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Explain the working principle of the...<a href=\"https:\/\/www.nksleepcare.com\/en\/products\/cpap\/\">CPAP machine<\/a> Simply put, it involves blowing positively pressured air into the airway to widen it. However, when you exhale, the air from the machine continues to push against the airflow, creating a &quot;wind wall&quot; that you have to exert force to resist.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If these symptoms are left untreated and you suspect something is wrong... <strong>How to fix stuffy air\/gas under a CPAP machine?<\/strong> Without making any changes, the negative consequences aren&#039;t limited to insomnia; the expelled gas may be swallowed into the stomach, causing bloating, belching, and gas upon waking up.&nbsp; <strong>(Read more:) <\/strong><a href=\"https:\/\/www.nksleepcare.com\/en\/cpap-aerophagia-bloating-causes-solutions\/\"><strong>Experiencing bloating and gas (aerophagia) while using a CPAP machine? Here are 5 simple ways to fix it for a comfortable, gas-free sleep.<\/strong><\/a><strong>)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">And most importantly, it worsens the quality of your sleep, causing you to wake up frequently throughout the night and resulting in insufficient rest.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Discover &quot;EPR &amp; Flex,&quot; the hidden exhalation control button that helps you sleep better.\u00a0<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Both are technologies developed by different manufacturers to solve the same problem: slightly reducing pressure during exhalation and then returning it to its original level during the next inhalation. Let&#039;s look at how these functions work.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>EPR (ResMed) System: How does it work? How effective is it at releasing diaphragm?\u00a0<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">EPR stands for Expiratory Pressure Relief. It&#039;s a unique ResMed technology that detects your exhalation rhythm in real time and temporarily reduces pressure. Generally, there are three adjustable levels. The higher the number, the more relaxing the experience, but this comes at the cost of reduced average pressure. Therefore, you need to choose a level that strikes a balance between comfort and therapeutic effectiveness.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Flex \/ PrismaRE system (Philips &amp; L\u00f6wenstein): Natural softness.\u00a0<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Philips and L\u00f6wenstein call this technology Flex or PrismaRE. Its operation differs slightly from EPR in that the system detects your breathing rhythm and gradually reduces pressure to create a curve that mimics real breathing physiology, resulting in a gentler and more natural airflow.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Ramp function: Aids in the initial stages of sleep.<\/strong>\u00a0<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">In addition to the exhalation system, another essential function is the ramp. This system starts blowing low-pressure air while you&#039;re drifting off to sleep, then gradually increases the pressure to a set level for a preset time (e.g., 20-30 minutes), perfectly matching the stage of drowsiness and helping to reduce discomfort from the start of sleep.&nbsp;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Here are some basic ways to relieve uncomfortable airflow from your CPAP machine that you can do yourself immediately.\u00a0<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For anyone who is looking for... <strong>How to adjust a CPAP machine to make exhaling easier.<\/strong> Try checking and following these three simple steps first.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Check the mask and straps:<\/strong> A mask that is too loose or too tight allows air to leak in, forcing your body to breathe more forcefully. Try adjusting the straps so they fit comfortably\u2014not too loose that air leaks into your eyes, and not too tight that they press against your nose or face.<\/li>\n\n\n\n<li><strong>Try enabling EPR or Flex mode:<\/strong> Try accessing the Comfort Menu on the device screen and enable the exhalation function at level 1. If you still feel uncomfortable, gradually increase it to level 2 or 3 as needed.<\/li>\n\n\n\n<li><strong>Adjust your sleeping position to lying on your side:<\/strong> Switching to sleeping on your side will help reduce the force of gravity pressing on your airway, allowing it to open up naturally. This helps you better tolerate air pressure and reduces feelings of discomfort.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Why settings provided by a Sleep Specialist are the safest and most accurate.\u00a0<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">While we can adjust the initial comfort level ourselves, fine-tuning airway pressure to a therapeutic level is more complex than we might think. Reducing expiratory pressure too much in exchange for comfort may result in insufficient remaining pressure to keep the airway open, leading to a relapse of sleep apnea, or in some cases, a worsening of symptoms. <a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC7725531\/\" target=\"_blank\" rel=\"noopener\">Improper sleep apnea settings can trigger Treatment-Emergent Central Sleep Apnea (TECSA), a complication that the medical community takes very seriously.<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is why care from specialists is so important. <strong>We have a team of Sleep Specialists.<\/strong> This system monitors and analyzes your sleep reports via the cloud, using real-time data while you sleep to assess your condition. If it detects issues such as difficulty breathing or a high API (Acute Sleep Apnea) score, our experts will remotely analyze and adjust the device settings for maximum accuracy and safety, saving you the time and effort of trial and error.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you&#039;re experiencing gas, bloating, or still wake up feeling drowsy and tired after using your sleep machine, don&#039;t let it go untreated. Contact us or send us screenshots of your sleep machine usage to our team of sleep experts. <a href=\"https:\/\/www.nksleepcare.com\/en\/\" data-type=\"link\" data-id=\"www.nksleepcare.com\"><strong>NK Sleepcare<\/strong> <\/a>Please provide care and analysis at...<strong> LINE OA: @nksleepcare<\/strong> We are ready to provide advice to help you get back to sleeping comfortably and safely every night.<\/p>","protected":false},"excerpt":{"rendered":"<p>Experiencing discomfort when exhaling while using a CPAP machine? Learn about the EPR\/Flex function, a breathing assistance feature, and how to safely adjust it, as advised by NK Sleepcare experts.<\/p>","protected":false},"author":2,"featured_media":193684,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"content-type":"","_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[1358],"tags":[1500,1501],"class_list":["post-193682","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category--cpap","tag--cpap-"],"taxonomy_info":{"category":[{"value":1358,"label":"\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07 CPAP"}],"post_tag":[{"value":1500,"label":"\u0e27\u0e34\u0e18\u0e35\u0e1b\u0e23\u0e31\u0e1a cpap \u0e43\u0e2b\u0e49\u0e2b\u0e32\u0e22\u0e43\u0e08\u0e2d\u0e2d\u0e01\u0e07\u0e48\u0e32\u0e22\u0e02\u0e36\u0e49\u0e19"},{"value":1501,"label":"\u0e2d\u0e36\u0e14\u0e2d\u0e31\u0e14\u0e25\u0e21 cpap \u0e41\u0e01\u0e49\u0e22\u0e31\u0e07\u0e44\u0e07"}]},"featured_image_src_large":["https:\/\/www.nksleepcare.com\/wp-content\/uploads\/2026\/07\/\u0e43\u0e0a\u0e49-CPAP-\u0e41\u0e25\u0e49\u0e27\u0e2d\u0e36\u0e14\u0e2d\u0e31\u0e14\u0e15\u0e2d\u0e19\u0e2b\u0e32\u0e22\u0e43\u0e08\u0e2d\u0e2d\u0e01_-\u0e23\u0e39\u0e49\u0e08\u0e31\u0e01\u0e1f\u0e31\u0e07\u0e01\u0e4c\u0e0a\u0e31\u0e19-EPR-_-Flex-\u0e15\u0e31\u0e27\u0e0a\u0e48\u0e27\u0e22\u0e1c\u0e48\u0e2d\u0e19\u0e25\u0e21\u0e2b\u0e32\u0e22\u0e43\u0e08\u0e43\u0e2b\u0e49\u0e2b\u0e25\u0e31\u0e1a\u0e2a\u0e1a\u0e32\u0e22\u0e02\u0e36\u0e49\u0e19-1400x788.png",1250,704,true],"author_info":{"display_name":"\u0e19\u0e1e.\u0e27\u0e23\u0e27\u0e31\u0e12\u0e19\u0e4c \u0e2a\u0e38\u0e27\u0e23\u0e23\u0e13\u0e23\u0e31\u0e01\u0e29\u0e4c","author_link":"https:\/\/www.nksleepcare.com\/en\/author\/dr-worawat-suwannaruxa\/"},"comment_info":0,"category_info":[{"term_id":1358,"name":"\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07 CPAP","slug":"%e0%b9%80%e0%b8%84%e0%b8%a3%e0%b8%b7%e0%b9%88%e0%b8%ad%e0%b8%87-cpap","term_group":0,"term_taxonomy_id":1358,"taxonomy":"category","description":"","parent":0,"count":23,"filter":"raw","cat_ID":1358,"category_count":23,"category_description":"","cat_name":"\u0e40\u0e04\u0e23\u0e37\u0e48\u0e2d\u0e07 CPAP","category_nicename":"%e0%b9%80%e0%b8%84%e0%b8%a3%e0%b8%b7%e0%b9%88%e0%b8%ad%e0%b8%87-cpap","category_parent":0}],"tag_info":[{"term_id":1500,"name":"\u0e27\u0e34\u0e18\u0e35\u0e1b\u0e23\u0e31\u0e1a cpap \u0e43\u0e2b\u0e49\u0e2b\u0e32\u0e22\u0e43\u0e08\u0e2d\u0e2d\u0e01\u0e07\u0e48\u0e32\u0e22\u0e02\u0e36\u0e49\u0e19","slug":"%e0%b8%a7%e0%b8%b4%e0%b8%98%e0%b8%b5%e0%b8%9b%e0%b8%a3%e0%b8%b1%e0%b8%9a-cpap-%e0%b9%83%e0%b8%ab%e0%b9%89%e0%b8%ab%e0%b8%b2%e0%b8%a2%e0%b9%83%e0%b8%88%e0%b8%ad%e0%b8%ad%e0%b8%81%e0%b8%87%e0%b9%88","term_group":0,"term_taxonomy_id":1500,"taxonomy":"post_tag","description":"","parent":0,"count":2,"filter":"raw"},{"term_id":1501,"name":"\u0e2d\u0e36\u0e14\u0e2d\u0e31\u0e14\u0e25\u0e21 cpap \u0e41\u0e01\u0e49\u0e22\u0e31\u0e07\u0e44\u0e07","slug":"%e0%b8%ad%e0%b8%b6%e0%b8%94%e0%b8%ad%e0%b8%b1%e0%b8%94%e0%b8%a5%e0%b8%a1-cpap-%e0%b9%81%e0%b8%81%e0%b9%89%e0%b8%a2%e0%b8%b1%e0%b8%87%e0%b9%84%e0%b8%87","term_group":0,"term_taxonomy_id":1501,"taxonomy":"post_tag","description":"","parent":0,"count":2,"filter":"raw"}],"_links":{"self":[{"href":"https:\/\/www.nksleepcare.com\/en\/wp-json\/wp\/v2\/posts\/193682","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nksleepcare.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nksleepcare.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nksleepcare.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nksleepcare.com\/en\/wp-json\/wp\/v2\/comments?post=193682"}],"version-history":[{"count":1,"href":"https:\/\/www.nksleepcare.com\/en\/wp-json\/wp\/v2\/posts\/193682\/revisions"}],"predecessor-version":[{"id":193685,"href":"https:\/\/www.nksleepcare.com\/en\/wp-json\/wp\/v2\/posts\/193682\/revisions\/193685"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nksleepcare.com\/en\/wp-json\/wp\/v2\/media\/193684"}],"wp:attachment":[{"href":"https:\/\/www.nksleepcare.com\/en\/wp-json\/wp\/v2\/media?parent=193682"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nksleepcare.com\/en\/wp-json\/wp\/v2\/categories?post=193682"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nksleepcare.com\/en\/wp-json\/wp\/v2\/tags?post=193682"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}