Dust Mites | American Lung Association

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Dust mites are too small for us to see. They are not parasites that bite, sting or burrow into our bodies. Instead, people who are allergic to dust or dust mites are reacting to inhaling proteins in dust that comes from dust mite feces, urine or decaying bodies. Any swelling (also called inflammation) of the nasal passages caused by dust mites is considered a dust allergy.</p><h2>Dust Mite Sources</h2><p>Dust mites occur naturally and can appear in nearly all homes; roughly four out of five homes in the United States have dust mite allergens in at least one bed. Dust mites can live in the bedding, mattresses, upholstered furniture, carpets or curtains. </p><p>Humidity is the most important factor in determining whether a house has high levels of dust mites. This is because dust mites do not drink water like we do; they absorb moisture from the air. In areas with low humidity, like deserts, dust mites cannot survive.</p><p>Unlike pet allergens, dust mite allergens do not usually stay in the air. Instead, the allergen settles quickly into dust or fabrics. These allergens cling to bedding, mattresses, upholstered furniture, carpets and curtains, which also serve as nests. Most exposure to dust mite allergens occurs while sleeping.</p><h2>How Dust Mite Allergens Affect Health</h2><p>Dust mites are one of the major indoor triggers for people with asthma.</p><p>Ongoing exposure to dust mites at home can impact the health of people with asthma and those who are allergic or sensitive to mites. These allergens can trigger mild to severe allergic symptoms and can be responsible for asthma attacks. A mild case may cause an occasional runny nose, watery eyes and sneezing. In severe cases, the condition is ongoing, resulting in persistent sneezing, cough, congestion, facial pressure or even a severe asthma attack. People with asthma who are sensitive to dust mites face an increased risk of asthma attacks.</p><h2>How to Protect Against Dust Mites</h2><p>You can take action to reduce dust mites in your home.</p><ul><li><strong>Reduce humidity</strong>. Keep your home below 50 percent humidity. In humid areas, air conditioning and dehumidifiers can help to draw moisture out of the air.</li><li><strong>Reduce the places where dust mites can live</strong>. Remove upholstered furniture or use furniture with smooth surfaces. Remove drapes and curtains. Cover mattresses and pillows with allergen encasements. Wash bedding in hot water (at least 120 degrees F) once a week. Reduce clutter, stuffed animals, and other places where dust mites live. If that’s not possible, wash stuffed animals weekly in hot water (at least 120 degrees) to kill and wash away dust mites.</li><li><strong>Replace carpets.</strong> Carpeting should be replaced by hard-surfaced flooring, especially if occupants are allergic to dust mites. If you must keep the carpet, use a vacuum cleaner with a HEPA (High-Efficiency Particulate Air) filter weekly. Damp clean floors often, focusing on catching dirt and dust without wet mopping.</li><li><strong>Dust regularly.</strong> Dust regularly to reduce the amount of dust and improve overall indoor air quality in your home. When dusting, use something that can trap and lock dust (like a damp washcloth or microfiber cloth) dust to reduce the amount of it that is stirred up when cleaning.</li></ul><p>People with allergies to dust mites or with asthma triggered by dust mite allergies need to reduce dust mites in their home.</p><p>Learn about dust mites and how to minimize exposure in the home in the video below. </p> </div> </div> </div> </div> </section> <section class=" " style="" id="section_ae308ef59b8e"> <div class="global-container"> <div class="row "> <div class="col-12"> <div class="card widget widget-video"> <a href="https://www.youtube.com/embed/9T8qNAMb2YA" class="video"> <div class="card-img" style="background-image:url('/optimize/getmedia/66f8dca0-704a-48b4-b504-fba183596240/removing-asthma-triggers-dust-mites.jpg?format=webp')"> <span class="icon-play"></span> <span class="sr-only">iframe video</span> </div> </a> <div class="widget-caption"> <a class="widget-video-cta video" href="https://www.youtube.com/embed/9T8qNAMb2YA">Watch Video <span class="icon-play"></span></a> </div> </div> </div> </div> </div> </section> <section class="no-padding"> <div class="global-container"> <p class="footnote right"><em>Page last updated: November 5, 2024</em></p> </div> </section> </div> </div> </div> </section> <a href="#modaal_nov_match_2024_copd" class="newsletter-modal-link" style="display:none;">Show</a> <div id="modaal_nov_match_2024_copd" class="newsletter-modal-content" style="display:none;" data-lightbox-id="nov_match_2024_copd" data-cookie-switch="False" data-create-cookie="true" data-expiration-days="5"> <div class="row"> <div class="offset-lg-6 col-lg-6"> <div class="card widget"> <div class="card-img desktop" style="background-image: url('/optimize/getmedia/ff1883ab-b03d-4f21-8d49-b47874d9f451/john_lightbox_L.jpg?width=992&height=372&ext=.jpg&format=webp')"></div> <div class="card-img mobile" style="background-image: url('/optimize/getmedia/c228d8f4-b0d3-4f3d-95ce-0ff36b7521df/john_lightbox_DM.jpg?width=768&height=336&ext=.jpg&format=webp')"></div> <div class="card-content js-newsletter-form"> <div class="newsletter-before"> <h3 class="card-title">Double Your Support Now</h3> <div class="card-summary"> <p>Your gift will have 2X the impact this COPD Awareness Month.</p> <p><a href="https://action.lung.org/site/Donation2?df_id=31271&mfc_pref=T&31271.donation=form1&topic=2024NovMatch2X&s_src=Lung.org&s_subsrc=home-lightbox" class="btn primary-btn">Donate today</a></p> </div> </div> <div class="newsletter-after d-none"> <h3 class="card-title"></h3> <div class="card-summary"> </div> </div> </div> </div> </div> </div> </div> <a href="#modaal_altnov_match_2024_copd" class="newsletter-modal-alt-link" style="display:none;">Show</a> <div id="modaal_altnov_match_2024_copd" class="newsletter-modal-content alt-lightbox-alt" style="display:none;" data-lightbox-id="nov_match_2024_copd" data-cookie-switch="False" data-create-cookie="true" data-expiration-days="5"> <div class="row"> <div class="offset-lg-6 col-lg-6"> <div class="card widget"> <div class="card-content js-newsletter-form"> <div class="newsletter-before"> <h3 class="card-title"></h3> <div class="card-summary"> </div> </div> <div class="newsletter-after d-none"> <h3 class="card-title"></h3> <div class="card-summary"> </div> </div> </div> </div> </div> </div> </div> </main> <section data-ktc-search-exclude="" class="section section-signup bg-white"> <div class="global-container"> <div class="row"> <div class="col-md-6"> <div class="section-signup-donate"> <h2 class="h4">Make a Donation</h2> <p class=""> Your tax-deductible donation funds lung disease and lung cancer research, new treatments, lung health education, and more. </p> <a id="signUpDonateBtn" href="/donate" class="btn secondary-btn homeDonateBtn">Make a Donation</a> </div> </div> <div class="col-md-6"> <div class="section-signup-email"> <div class="js-newsletter-form"> <h2 class="h4">Become a Lung Health Insider</h2> <p class="">Join over 700,000 people who receive the latest news about lung health, including research, lung disease, air quality, quitting tobacco, inspiring stories and more!</p> <div class="newsletter-before"> <form action="https://action.lung.org/site/SSurvey" method="post" name="responsiveSurvey" id="responsiveSurvey-footer" class="" target="redirectframe"> <div class="input-group newsletter-signup"> <label for="email-signup" class="sr-only">Sign Up For Newsletter</label> <div class="d-none"> <input type="checkbox" aria-label="Remember me" name="s_rememberMe" id="footer-s_rememberMe" checked="checked"> <input type="text" aria-label="newsletter script checker" name="3264_56280_7_103920" class="password_alt hnypt password" id="footer-3264_56280_7_103920" value="" alt="This field is used to prevent form submission by scripts." oninput="for (var i = 1; 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