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</ iframe > </noscript> <!-- End Google Tag Manager (noscript) --><div id="header"> <div id="CClogo"><a href="https://www.cookchildrens.org"><span class="srText">Cook Children's</span></a></div> <div id="CCsearch"> <form id="searchform" name="searchform" method="GET" onsubmit="return (this.q.value == '') ? false : true;" action="/CookChildrens/en/parents/"> <input type="hidden" name="search" value="y"/> <input type="hidden" name="getfields" value="description"/> <input type="search" class="search" name="q" id="q" maxlength="256" autocomplete="off" autocorrect="off" placeholder="Search"/> <input type="hidden" name="datasource" value="cookchildrens"> <input type="hidden" name="start" value="0"> <input type="hidden" name="rows" value="10"> <input type="hidden" name="lang" value="english"> <input type="hidden" name="section" value="parents_teens_kids"> <input type="submit" value="" id="searchButton" class="buttonImage"/> </form> </div> </div> <!-- If we have main navigation separated then it will reside here --> <div id="thelou" tabindex="-1"> </div> <div id="mainContentContainer" class="kh-article-page"> <div id="rsSearchBrowse"> <div id="rsBrowse" role="navigation"> </div> <div id="rsSearch"> <div id="rsSectionLabel">kids</div> </div> </div> <div id="khContentHeading" class="ar licH"> <h1>What's Sinusitis?</h1> </div> <div class="clearBox"> </div> <div id="khcontent"> <div id="xp1"> </div><br clear="all" style="width: 0; height: 0; line-height: 0; font-size: 0;"><div id="khcontent_article" lang="en-us"> <div id="NavigatePage1"> <div id="whichRead_1"><span class="ISI_MESSAGE"><!-- The following article is brought to you by CookChildrens. --></span><div class="rs_skip rs_skip_en rsbtn_kidshealth rs_preserve" id="readspeaker_button1"><script> var theRSURL = (escape(document.location.href)); var rsAudioTitle = document.title.replace(/ |\'|\?/g,"_"); var whichReadPage = 1; var doesItGotFlash = ''; makeTheRSLinkEN(); var readSpeakerDownloadLink = "//app-na.readspeaker.com/cgi-bin/rsent?customerid=5202&lang=en_us&voice=Kate&speed=100&readid=khcontent_article&url="+theRSURL+"&audiofilename=KidsHealth_"+rsAudioTitle+""; </script></div><div class="rte-image"><!--<sly data-sly-test.buttonBorder="khb-noborder"></sly> --><h3>Sinusitis</h3><p>Say: syne-yuh-SYE-tis</p><p>Sinusitis is an <a href="/CookChildrens/en/kids/word-infection.html">infection</a> of the <a href="/CookChildrens/en/kids/sinuses.html">sinuses</a>, which are air-filled spaces in the bones of your face around the nose. Like the inside of your nose, the sinuses are lined with a thin layer of tissue called the <a href="/CookChildrens/en/kids/word-mucous-membrane.html">mucous membrane</a> that makes <a href="/CookChildrens/en/kids/word-mucus.html">mucus</a> (snot).</p><p>When you have a cold or <a href="/CookChildrens/en/kids/allergies.html">allergies</a>, the tiny holes that drain the sinuses can get blocked and trap mucus and germs in the sinuses, which can lead to sinusitis.</p></div><span class="ISI_MESSAGE"><!--Thank you for listening to this KidsHealth audio cast. The information you heard, is for educational purposes only. If you need medical advice, diagnoses, or treatment, consult your doctor. This audio cast is Copyrighted by KidsHealth. All rights are reserved.--></span></div> </div> </div> </div> <!--googleoff:all--> <div id="relatedBoxParents" class="t1 "> <div id="navTabs"> <ul id="navTabsPKT" role="tablist" aria-labelledby="moreOnThisTopicHeader"> <li role="presentation" class="current" id="PKTtabKids"><button class="PKTJSTButton" role="tab" id="kids_tab" aria-controls="relatedArticlesListKids" aria-selected="true" tabindex="0"><span>for Kids</span></button></li> </ul> </div> <div id="mainBar"> </div> <div id="mrLinks"> <h2 id="moreOnThisTopicHeader">MORE ON THIS TOPIC</h2> <ul id="relatedArticlesListKids" role="tabpanel" aria-labelledby="kids_tab"> <li><a href="/CookChildrens/en/kids/allergies.html?WT.ac=k-ra">Learning About Allergies</a></li> <li><a href="/CookChildrens/en/kids/sinuses.html?WT.ac=k-ra">When Sinuses Attack!</a></li> </ul> </div> <div id="boxBreaker"> </div> <div id="zeroTester"> </div> <div id="relatedButtonsHolder"> <div id="relatedButtonsBoth"> <ul> <li id="relatedPrinterButton"><a href="/CookChildrens/en/kids/sinusitis.html?view=ptr&WT.ac=k-ptr" rel="nofollow" onclick="printWindow(this.href); return false;" title="This link will open in a new window.">Print<span class="newWindowIcon_leftSpace"> </span></a></li> <li id="relatedEmailFriendButton"><a rel="nofollow" href="/CookChildrens/en/kids/sinusitis.html?view=emailto&WT.ac=s2af-en-kids-sinusitis.html" target="_blank" title="This link will open in a new window.">Send to a Friend<span class="newWindowIcon_leftSpace"> </span></a></li> </ul> </div> </div><br clear="all"></div><br clear="all"><script>window.onload=setVars('');PKTChoose(0,2,0,0);</script><div id="kh_lic_footer"> <nav aria-label="Content info"> <ul id="kh_lic_footer_links"> <li><a href="/CookChildrens/en/kids/editorial-policy-licensee.html">Editorial Policy</a></li> <li><a href="/CookChildrens/en/kids/policy-licensees.html">KidsHealth Privacy Policy & Terms of Use</a></li> <li><a href="/CookChildrens/en/kids/copyright.html">Copyright</a></li> </ul> </nav> <div id="kh_lic_footer_legalease"> <p><img lang="en" alt="A KidsHealth Education Partner" src="/images/n00/logos/eduPartner3.svg"> Note: All information is for educational purposes only. 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