{"id":4517,"date":"2025-01-08T12:52:59","date_gmt":"2025-01-08T04:52:59","guid":{"rendered":"http:\/\/scubatechphilippines.com\/scuba_blog\/?p=4517"},"modified":"2025-01-08T12:52:59","modified_gmt":"2025-01-08T04:52:59","slug":"types-decompression-sickness-dcs","status":"publish","type":"post","link":"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/","title":{"rendered":"Types of Decompression Sickness (DCS)"},"content":{"rendered":"\n<h1 class=\"wp-block-heading has-text-align-center\">Types of Decompression Sickness (DCS)<\/h1>\n\n\n\n<p><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/understanding-m-values-eric-baker\/\">Decompression<\/a> sickness (DCS) is caused by inert gases leaving solution inside the body and forming bubbles. If allowed to grow sufficiently large, those bubbles present signs and symptoms, which allow DCS to be diagnosed. There are several different types of decompression sickness, depending upon the symptoms observed and the nature of the dive undertaken.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">Article Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/#What-are-the-six-types-of-decompression-sickness\" >What are the six types of decompression sickness?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/#Type-1-DCS-Minor\" >Type 1 DCS &nbsp;Minor<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/#Type-2-DCS-CardiovascularPulmonary-and-Neurological\" >Type 2 DCS Cardiovascular\/Pulmonary and Neurological<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/#Type-3-DCS-Cerebral-Spinal-Arterial-DCS\" >Type 3 DCS Cerebral-Spinal Arterial DCS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/#Pulmonary-DCS\" >Pulmonary DCS<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/#Inner-Ear-Decompression-Sickness-IEDCS-IBCD-and-PFO-Induced\" >Inner Ear Decompression Sickness (IEDCS) IBCD and PFO Induced<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/#IBCD-Induced-Vestibular-DCS\" >IBCD-Induced Vestibular DCS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/#PFO-Induced-Vestibular-DCS\" >PFO-Induced Vestibular DCS<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/#Non-emergency-types-of-decompression-sickness\" >Non-emergency types of decompression sickness<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/#Type-4-DCS-Osteopathic\" >Type 4 DCS Osteopathic<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/#Sub-Clinical-DCS-Decompression-stress\" >Sub-Clinical DCS Decompression stress<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/#About-The-Author\" >About The Author<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/types-decompression-sickness-dcs\/#Purchase-my-exclusive-diving-ebooks\" >Purchase my exclusive diving ebooks!<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What-are-the-six-types-of-decompression-sickness\"><\/span>What are the six types of decompression sickness?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<div class=\"scuba-b4-h2-2\" style=\"margin-top: 10px;margin-bottom: 10px;\" id=\"scuba-300448370\"><div class=\"scuba-adlabel\">Sponsored Link<\/div><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-9354033900485448\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-9354033900485448\" \ndata-ad-slot=\"2393012471\" \ndata-ad-format=\"auto\" data-full-width-responsive=\"false\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Type-1-DCS-Minor\"><\/span>Type 1 DCS: &nbsp;Minor<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Symptoms:<\/strong> Localized pain, skin itching (Pruritis) and skin rash (Cutis marmorata)<\/p>\n\n\n\n<p>Type 1 DCS symptoms can arise within 10 minutes of surfacing from the dive and grow in severity over time. Pain is typically focused on a joint, often resulting from a bubble\/s impinging on a nerve, but that is not always the case.  <\/p>\n\n\n\n<p>The skin rash is distinguishable because it is sub-dermal; bubbles are causing damage in the minor capillaries beneath the skin; with close inspection, it does not look like a contact rash on the surface of the skin.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"256\" height=\"230\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2023\/01\/skin-mottling-dan-256x230-1.jpg\" alt=\" DCS Type 1 skin rash types of decompression sickness\" class=\"wp-image-19241\"\/><figcaption class=\"wp-element-caption\">Type 1 DCS Skin Rash<\/figcaption><\/figure>\n\n\n\n<p>These symptoms must always be treated as a medical emergency because, whilst seemingly minor, they can potentially progress into life-threatening Type 2 DCS. <\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-andy-davis-sidemount-technical-wreck-diving-blog wp-block-embed-andy-davis-sidemount-technical-wreck-diving-blog\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"SIQGj7c3Ty\"><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/skin-bends-cutaneous-dcs-decompression-sickness\/\">Skin Bends: A Guide to Cutaneous Decompression Sickness<\/a><\/blockquote><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;Skin Bends: A Guide to Cutaneous Decompression Sickness&#8221; &#8212; Andy Davis Sidemount Technical Wreck Diving Blog\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/skin-bends-cutaneous-dcs-decompression-sickness\/embed\/#?secret=6PAZY6RXEM#?secret=SIQGj7c3Ty\" data-secret=\"SIQGj7c3Ty\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Type-2-DCS-CardiovascularPulmonary-and-Neurological\"><\/span>Type 2 DCS: Cardiovascular\/Pulmonary and Neurological<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Symptoms: <\/strong>Severe pain, organ failure, decreasing levels of consciousness, cognitive ability, communication, mobility, dexterity, sensation and bodily control (including; breathing, bladder and bowel control).<\/p>\n\n\n\n<p>Type 2 DCS is more severe. In these cases, bubbles are causing damage within the brain and central <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/scuba-diving-stress-management-and-diver-panic\/\">nervous<\/a> system and\/or impeding the function of organs. The effect within different organs will cause different symptoms; for instance an acculmulation of bubbles within the lungs will cause &#8220;chokes&#8221;; the diver will cough involuntarily as though they have a foreign object in their lungs. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Type-3-DCS-Cerebral-Spinal-Arterial-DCS\"><\/span>Type 3 DCS: Cerebral-Spinal Arterial DCS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Symptoms: <\/strong>Paralysis, partial paralysis, weakness and loss of consciousness<\/p>\n\n\n\n<p>Type 3 Cardiopulmonary DCS involves the <a href=\"https:\/\/world.dan.org\/wp-content\/uploads\/2021\/06\/2018-proceedings-differential-diagnosis-final2.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">complication of a spinal or cerebral arterial gas embolism<\/a> (AGE) in addition to Type 2 DCS.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.uhms.org\/images\/Publications\/ADJUNCTIVE_THERAPY_FOR_DCI.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Does not involve pulmonary barotrauma<\/a>, i.e. lung injury from breath-hold ascent.<\/li>\n\n\n\n<li>Involves <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/2219551\/\" target=\"_blank\" rel=\"noreferrer noopener\">bubble migration from venous to arterial blood<\/a> via Patent Foramen Ovale (PFO) or intracardiac shunt.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-andy-davis-sidemount-technical-wreck-diving-blog wp-block-embed-andy-davis-sidemount-technical-wreck-diving-blog\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"Du48OvsIg5\"><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pfo-patent-foramen-ovale-dcs-risk-diving\/\">PFO &#8211; Patent Foramen Ovale and DCS Risk in Diving<\/a><\/blockquote><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;PFO &#8211; Patent Foramen Ovale and DCS Risk in Diving&#8221; &#8212; Andy Davis Sidemount Technical Wreck Diving Blog\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/pfo-patent-foramen-ovale-dcs-risk-diving\/embed\/#?secret=vLW98QAWUq#?secret=Du48OvsIg5\" data-secret=\"Du48OvsIg5\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<div class=\"scuba-b4-h2-3\" style=\"margin-top: 10px;margin-bottom: 10px;\" id=\"scuba-2957721884\"><div class=\"scuba-adlabel\">Sponsored Link<\/div><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-9354033900485448\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-9354033900485448\" \ndata-ad-slot=\"6151212517\" \ndata-ad-format=\"auto\" data-full-width-responsive=\"false\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Pulmonary-DCS\"><\/span>Pulmonary DCS<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Symptoms: <\/strong>dry uncontrollable cough (&#8220;the chokes&#8221;), sore throat, chest pain behind the sternum or breastbone, breathing difficulty (dyspnea), cardiac arrhythmia, pulmonary edema, unconsciousness, and asphyxia.<\/p>\n\n\n\n<p>Pulmonary DCS, known as &#8220;the chokes&#8221;, is characterized by symptoms related to the lungs.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Symptoms are a result of gas bubbles forming in the bloodstream and affecting the circulatory and respiratory systems.<\/li>\n\n\n\n<li>Pulmonary DCS can be difficult to differentiate from <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/immersion-pulmonary-edema-oedema-ipe-ipo\/\">Immersion Pulmonary Edema<\/a> (IPO\/IPE).<\/li>\n\n\n\n<li>It is <a href=\"https:\/\/www.uhms.org\/images\/Publications\/ADJUNCTIVE_THERAPY_FOR_DCI.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">propose<\/a>d that the \u2018chokes\u2019 were a vascular reaction to bubbles in the mucus membranes of the tracheobronchial system; i.e. similar to a skin bend, but internal.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Inner-Ear-Decompression-Sickness-IEDCS-IBCD-and-PFO-Induced\"><\/span>Inner Ear Decompression Sickness (IEDCS): IBCD and PFO Induced <span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Symptoms: <\/strong>severe vertigo, nausea and localized ear\/head pain.<\/p>\n\n\n\n<p>Inner Ear Decompression Sickness (IEDCS), also known as Vestibular or Audiovestibular DCS, is a bubble of inert gas within the inner ear. <\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"IBCD-Induced-Vestibular-DCS\"><\/span>IBCD-Induced Vestibular DCS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>This can be caused due to <a href=\"http:\/\/www.advanceddivermagazine.com\/articles\/icd\/icd.html\" target=\"_blank\" rel=\"noreferrer noopener\">Isobaric Counter-Diffusion<\/a> (IBCD) if a technical hypoxic <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/why-do-deep-divers-use-helium\/\">trimix<\/a> diver switches from a helium-rich gas mixture to a rich oxygen mixture during their ascent. <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>IBCD-induced Vestibular DCS has not been observed in dives shallower than 70m. <\/li>\n\n\n\n<li>Gas selection techniques are taught on full trimix courses to avoid this risk. <\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"PFO-Induced-Vestibular-DCS\"><\/span>PFO-Induced Vestibular DCS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>A second cause of Vestibular DCS, that does not involve IBCD, is related to Patent Foramen Ovale (PFO). <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>PFO is a heart defect that allows blood to move between the left and right atria (upper chambers) of the heart. <\/li>\n\n\n\n<li>This allows inert-gas-rich blood to bypass the lungs and reduces off-gassing efficiency. <\/li>\n\n\n\n<li>In rare cases, the right-to-left shunt can cause an arterial gas embolism (AGE) to enter the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Labyrinthine_artery\" target=\"_blank\" rel=\"noreferrer noopener\">labyrinthine artery<\/a>; the primary source of blood for the inner ear.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-andy-davis-sidemount-technical-wreck-diving-blog wp-block-embed-andy-davis-sidemount-technical-wreck-diving-blog\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"VuYhGxd5GZ\"><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/iedcs-inner-ear-dcs-decompression-sickness\/\">Understanding Inner-Ear Decompression Sickness (IEDCS) for Divers<\/a><\/blockquote><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;Understanding Inner-Ear Decompression Sickness (IEDCS) for Divers&#8221; &#8212; Andy Davis Sidemount Technical Wreck Diving Blog\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/iedcs-inner-ear-dcs-decompression-sickness\/embed\/#?secret=AwuzenTvn1#?secret=VuYhGxd5GZ\" data-secret=\"VuYhGxd5GZ\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Non-emergency-types-of-decompression-sickness\"><\/span>Non-emergency types of decompression sickness<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Type-4-DCS-Osteopathic\"><\/span>Type 4 DCS: Osteopathic<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Symptoms:<\/strong> long-term degeneration of the bones<\/p>\n\n\n\n<p>Dysbaric Osteo-Necrosis (DON); is a long-term condition where frequent and repeated exposure to hyperbaric conditions (increased pressure) and variation (pressure changes) causes necrosis (death\/brittleness) of the skeletal bones.<\/p>\n\n\n\n<div class=\"scuba-b4-h2-4\" style=\"margin-top: 10px;margin-bottom: 10px;\" id=\"scuba-1471665168\"><div class=\"scuba-adlabel\">Sponsored Link<\/div><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-9354033900485448\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-9354033900485448\" \ndata-ad-slot=\"2954736365\" \ndata-ad-format=\"auto\" data-full-width-responsive=\"false\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Sub-Clinical-DCS-Decompression-stress\"><\/span>Sub-Clinical DCS: Decompression stress<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Symptoms:<\/strong> post-dive lethargy, reduced vitality, somnolence\/sleepiness, general malaise<\/p>\n\n\n\n<p><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/subclinical-dcs-decompression-stress-fatigue\/\">Sub-clinical DCS, aka decompression stress<\/a>, is the physiological effect of excessive <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/sub-clinical-decompression-sickness-stress-micro-bubbles\/\">micro-bubbles<\/a> within the body after diving. As these symptoms do not constitute an injury or medical emergency, this level of DCS is disregarded medically and rarely included within the types of decompression sickness.<\/p>\n\n\n\n<p>It is proven that micro-bubbles always do occur in our bodies on the ascent from scuba dives. We can also accept that those bubbles may not grow to sufficient size to cause immediate physical harm and present diagnoseable\/clinical symptoms of decompression sickness.<\/p>\n\n\n\n<p>Medically, the frequency of stable (not growing) micro-bubbles is largely irrelevant to diagnosing decompression sickness. Unless they are able to accumulate and &#8216;merge&#8217; to form larger bubbles, those micro-bubbles will not cause a sufficiently intense problem to register on the victim. <\/p>\n\n\n\n<p><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/subclinical-dcs-decompression-stress-fatigue\/\">Sub-clinical DCS<\/a> may be suspected if the diver observes otherwise unexplainable symptoms after their dives. It can only be confirmed through ultra-sound measurement of micro-bubble size and number.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-andy-davis-sidemount-technical-wreck-diving-blog wp-block-embed-andy-davis-sidemount-technical-wreck-diving-blog\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"9Kr2tS61LT\"><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/subclinical-dcs-decompression-stress-fatigue\/\">Decompression Stress: Post-Dive Fatigue and Subclinical DCS<\/a><\/blockquote><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;Decompression Stress: Post-Dive Fatigue and Subclinical DCS&#8221; &#8212; Andy Davis Sidemount Technical Wreck Diving Blog\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/subclinical-dcs-decompression-stress-fatigue\/embed\/#?secret=nC1IlBHOrA#?secret=9Kr2tS61LT\" data-secret=\"9Kr2tS61LT\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-andy-davis-sidemount-technical-wreck-diving-blog wp-block-embed-andy-davis-sidemount-technical-wreck-diving-blog\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"eMlHTOvlXC\"><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/diving-dehydration-and-dcs\/\">Scuba Diving, Dehydration and DCS<\/a><\/blockquote><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"&#8220;Scuba Diving, Dehydration and DCS&#8221; &#8212; Andy Davis Sidemount Technical Wreck Diving Blog\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/diving-dehydration-and-dcs\/embed\/#?secret=YZdXjYmAUC#?secret=eMlHTOvlXC\" data-secret=\"eMlHTOvlXC\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n<\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n\n\n\n<div class=\"wp-block-columns alignwide is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-content-justification-center is-layout-constrained wp-block-column-is-layout-constrained\" style=\"flex-basis:25%\">\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-medium is-resized is-style-default\"><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/andy-davis-technical-diving\/\"><img decoding=\"async\" width=\"300\" height=\"296\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/Cartoon-Andy-900x900-1-300x296.png\" alt=\"Andy Davis Technical Sidemount Wreck Diving Subic Bay Philippines RAID Courses Training\" class=\"wp-image-6812\" style=\"width:225px;height:222px\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/Cartoon-Andy-900x900-1-300x296.png 300w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/Cartoon-Andy-900x900-1-1024x1009.png 1024w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/Cartoon-Andy-900x900-1-768x757.png 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2018\/03\/Cartoon-Andy-900x900-1.png 1280w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-constrained wp-block-column-is-layout-constrained\" style=\"flex-basis:75%\">\n<h2 class=\"wp-block-heading has-text-align-center\"><span class=\"ez-toc-section\" id=\"About-The-Author\"><\/span>About The Author<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><a href=\"https:\/\/buymeacoffee.com\/andydavistech\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" width=\"274\" height=\"77\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/bmc-button-1-1.png\" alt=\"\" class=\"wp-image-27046\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/bmc-button-1-1.png 274w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2022\/12\/bmc-button-1-1-250x70.png 250w\" sizes=\"(max-width: 274px) 100vw, 274px\" \/><\/a><\/figure>\n\n\n\n<p><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/andy-davis-technical-diving\/\">Andy Davis<\/a> is a <a href=\"https:\/\/scubatechphilippines.com\/raid-diving-courses-philippines\/raid\/\">RAID<\/a>, PADI TecRec, ANDI, BSAC, and SSI-qualified independent <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/what-is-technical-diving\/\">technical diving<\/a> instructor who specializes in teaching <a href=\"https:\/\/scubatechphilippines.com\/sidemount-courses\/\">sidemount<\/a>, <a href=\"https:\/\/scubatechphilippines.com\/technical-diving-courses\/\">trimix<\/a>, and <a href=\"https:\/\/scubatechphilippines.com\/technical-diving-courses\/\">advanced wreck<\/a> diving courses.<\/p>\n<\/div>\n<\/div>\n\n\n\n<p>Currently residing in <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/subic-bay-wreck-diving-sites\/\">Subic Bay, Philippines<\/a>; he has amassed more than 10,000 open-circuit and CCR dives over three decades of challenging diving across the globe.<\/p>\n\n\n\n<p><a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/andy-davis-technical-diving\/\">Andy<\/a> has published numerous diving magazine articles and designed advanced certification courses for several dive training agencies, He regularly tests and reviews new <a href=\"https:\/\/scubatechphilippines.com\/scuba_blog\/scuba-equipment-shopping-buying-best-dive-gear\/\">dive gear<\/a> for scuba equipment manufacturers. Andy is currently writing a series of <a href=\"https:\/\/www.buymeacoffee.com\/andydavistech\/extras\">advanced diving books <\/a>and creating a range of <a href=\"https:\/\/www.redbubble.com\/people\/andydavistech\/shop\">tech diving clothing and accessories<\/a>.<\/p>\n\n\n\n<p>Prior to becoming a professional technical diving educator in 2006, Andy was a commissioned officer in the Royal Air Force and has served in Iraq, Afghanistan, Belize, and Cyprus.<\/p>\n\n\n\n<p>In 2023, Andy was named in the &#8220;<a rel=\"noreferrer noopener\" href=\"https:\/\/gue.com\/blog\/sidemount-andy-davies\/\" target=\"_blank\">Who&#8217;s Who of Sidemount<\/a>&#8221; list by GUE InDepth Magazine.<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-palette-color-7-color has-vivid-red-background-color has-text-color has-background has-link-color wp-elements-dd81a6de961563c5bf17302e4376cbd2\"><span class=\"ez-toc-section\" id=\"Purchase-my-exclusive-diving-ebooks\"><\/span>Purchase my exclusive diving ebooks!<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<div class=\"wp-block-columns is-not-stacked-on-mobile is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/buymeacoffee.com\/andydavistech\/e\/233191\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" width=\"652\" height=\"1024\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-652x1024.jpg\" alt=\"Gas Management For Scuba Divers Book\" class=\"wp-image-26264\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-652x1024.jpg 652w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/03\/Gas-Management-Book-Cover-Image-191x300.jpg 191w, 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srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/Shearwater-Gradient-Factors-ebook-652x1024.jpg 652w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/Shearwater-Gradient-Factors-ebook-191x300.jpg 191w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/Shearwater-Gradient-Factors-ebook-768x1206.jpg 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/Shearwater-Gradient-Factors-ebook-978x1536.jpg 978w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/Shearwater-Gradient-Factors-ebook-95x150.jpg 95w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/Shearwater-Gradient-Factors-ebook.jpg 1200w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/buymeacoffee.com\/andydavistech\/e\/111242\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" width=\"652\" height=\"1024\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/COVER-IMAGE-652x1024.jpg\" alt=\"\" class=\"wp-image-26656\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/COVER-IMAGE-652x1024.jpg 652w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/COVER-IMAGE-191x300.jpg 191w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/COVER-IMAGE-768x1206.jpg 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/COVER-IMAGE-96x150.jpg 96w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/COVER-IMAGE.jpg 794w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-not-stacked-on-mobile is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/buymeacoffee.com\/andydavistech\/e\/262907\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" width=\"652\" height=\"1024\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/07\/BPW-Book-Cover-Image-652x1024.jpg\" alt=\"A Comprehensive Guide to Backplate &amp; Wing BCDs\" class=\"wp-image-26808\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/07\/BPW-Book-Cover-Image-652x1024.jpg 652w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/07\/BPW-Book-Cover-Image-191x300.jpg 191w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/07\/BPW-Book-Cover-Image-768x1206.jpg 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/07\/BPW-Book-Cover-Image-96x150.jpg 96w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/07\/BPW-Book-Cover-Image.jpg 794w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/buymeacoffee.com\/andydavistech\/e\/260377\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" width=\"652\" height=\"1024\" src=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/The-Path-To-Proficiency-Book-Cover-Image-652x1024.jpg\" alt=\"Diving Psychology The Path to Proficiency: Mental Strategies for Scuba Divers (eBook)\" class=\"wp-image-26633\" srcset=\"https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/The-Path-To-Proficiency-Book-Cover-Image-652x1024.jpg 652w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/The-Path-To-Proficiency-Book-Cover-Image-191x300.jpg 191w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/The-Path-To-Proficiency-Book-Cover-Image-768x1206.jpg 768w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/The-Path-To-Proficiency-Book-Cover-Image-96x150.jpg 96w, https:\/\/scubatechphilippines.com\/scuba_blog\/wp-content\/uploads\/2024\/05\/The-Path-To-Proficiency-Book-Cover-Image.jpg 794w\" sizes=\"(max-width: 652px) 100vw, 652px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-dots\"\/>\n<p id=\"rop\"><small>Originally posted 2018-11-05 06:10:48. <\/small><\/p>","protected":false},"excerpt":{"rendered":"<p>Decompression sickness types and symptoms. Medical catagorizations of DCS, along with sub-clinical DCS, aka decompression stress.<\/p>\n","protected":false},"author":2,"featured_media":19254,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2196],"tags":[197,580,326,325],"class_list":["post-4517","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dcs-decompression-sickness","tag-decompression","tag-diving-decompression-sickness","tag-scuba-diving-decompression-illness","tag-scuba-diving-decompression-sickness-dcs"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":6}},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Types of Decompression Sickness (DCS) - Andy Davis Sidemount Technical Wreck Diving Blog<\/title>\n<meta name=\"description\" content=\"Decompression sickness types and symptoms. 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