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</div><div><span>Subacute thyroiditis</span></div></div>
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<article><div id="d-article"><div class="page-info"><div class="page-title"><a name="start" id="start">
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</a><h1 class="with-also" itemprop="name">Subacute thyroiditis</h1>
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</noscript></div><div class="main"><div id="ency_summary"><p>Subacute thyroiditis is an immune reaction of the thyroid gland that often follows an upper respiratory infection.</p><p>The thyroid gland is located in the neck, just above where your collarbones meet in the middle.</p></div><section><div class="section"><div class="section-header"><div class="section-title"><h2>Causes</h2></div><div class="section-button"><button type="submit" aria-controls="section-1" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-1"><p>Subacute thyroiditis is an uncommon condition. It is thought to be the result of a viral infection. The condition often occurs a few weeks after a viral infection of the ear, sinus, or throat, such as mumps, the flu, or a common cold.</p><p>Subacute thyroiditis occurs most often in middle-aged women with symptoms of a viral upper respiratory tract infection in the past month.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Symptoms</h2></div><div class="section-button"><button type="submit" aria-controls="section-2" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-2"><p>The most obvious symptom of subacute thyroiditis is pain in the neck caused by a swollen and inflamed thyroid gland. Sometimes, the pain can spread (radiate) to the jaw or ears. The thyroid gland may be painful and swollen for weeks or, in rare cases, months.</p><p>Other symptoms include:</p><ul><li>Tenderness when gentle pressure is applied to the thyroid gland</li><li>Difficulty or painful swallowing, hoarseness</li><li><a test="test" href="./003088.htm">Fatigue</a>, feeling weak</li><li>Fever</li></ul><p>The inflamed thyroid gland may release too much thyroid hormone, causing symptoms of <a test="test" href="./000356.htm">hyperthyroidism</a>, including:</p><ul><li>More frequent bowel movements</li><li>Hair loss</li><li><a test="test" href="./003094.htm">Heat intolerance</a></li><li>Irregular (or very light) menstrual periods in women</li><li>Mood changes</li><li>Nervousness, shaking hands (<a test="test" href="./003192.htm">tremors</a>)</li><li><a test="test" href="./003081.htm">Palpitations</a></li><li>Sweating</li><li>Weight loss, but with increased appetite</li></ul><p>As the thyroid gland heals, it may release too little hormone, causing symptoms of <a test="test" href="./000353.htm">hypothyroidism</a>, including:</p><ul><li><a test="test" href="./003095.htm">Cold intolerance</a></li><li>Constipation</li><li>Fatigue</li><li>Irregular (or heavy) menstrual periods in women</li><li>Weight gain</li><li>Dry skin</li><li>Mood changes</li></ul><p>Thyroid gland function often returns to normal over a few months. During this time you may need treatment for your underactive thyroid. In rare cases, hypothyroidism may be permanent.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Exams and Tests</h2></div><div class="section-button"><button type="submit" aria-controls="section-3" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-3"><p>Laboratory tests that may be done include:</p><ul><li><a test="test" href="./003684.htm">Thyroid stimulating hormone</a> (TSH) level
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</li><li><a test="test" href="./003517.htm">T4</a> (thyroxine) and <a test="test" href="./003687.htm">T3</a> (triiodothyronine) level
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</li><li><a test="test" href="./003689.htm">Radioactive iodine uptake</a></li><li>
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Thyroglobulin level
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</li><li><a test="test" href="./003638.htm">Erythrocyte sedimentation rate</a> (ESR)
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</li><li><a test="test" href="./003356.htm">C-reactive protein</a> (CRP)</li><li><a test="test" href="./003776.htm">Thyroid ultrasound</a></li></ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Treatment</h2></div><div class="section-button"><button type="submit" aria-controls="section-4" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-4"><p>The goal of treatment is to reduce pain and treat hyperthyroidism, if it occurs. Medicines such as aspirin or ibuprofen are used to control pain in mild cases.</p><p>More serious cases may need short-term treatment with medicines that reduce swelling and inflammation, such as prednisone. Symptoms of an overactive thyroid are treated with a class of medicines called beta-blockers.</p><p>If the thyroid becomes underactive during the recovery phase, thyroid hormone replacement may be needed.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Outlook (Prognosis)</h2></div><div class="section-button"><button type="submit" aria-controls="section-5" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-5"><p>The condition should improve on its own. But the illness may last for months. Long-term or severe complications do not often occur.</p><p>The condition is not infectious. People cannot catch it from you. It is not inherited within families like some thyroid conditions.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>When to Contact a Medical Professional</h2></div><div class="section-button"><button type="submit" aria-controls="section-6" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-6"><p>Contact your health care provider if:</p><ul><li>You have symptoms of this disorder.</li><li>You have thyroiditis and symptoms do not improve with treatment.</li></ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Prevention</h2></div><div class="section-button"><button type="submit" aria-controls="section-7" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-7"><p>Vaccines that prevent viral infections such as the flu may help prevent subacute thyroiditis. Other causes may not be preventable.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Alternative Names</h2></div><div class="section-button"><button type="submit" aria-controls="section-Alt" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-Alt"><p>De Quervain's thyroiditis; Subacute nonsuppurative thyroiditis; Giant cell thyroiditis; Subacute granulomatous thyroiditis; Hyperthyroidism - subacute thyroiditis</p></div></div></section><section><div class="section sec-mb"><div class="section-header"><div class="section-title"><h2>Images</h2></div><div class="section-button"><button type="submit" aria-controls="section-tnails" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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<li><img src="//medlineplus.gov/ency/images/ency/tnails/1093t.jpg" alt="Endocrine glands" title="Endocrine glands" class="side-img"/><a href="../imagepages/1093.htm">Endocrine glands</a></li>
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<li><img src="//medlineplus.gov/ency/images/ency/tnails/8966t.jpg" alt="Thyroid gland" title="Thyroid gland" class="side-img"/><a href="../imagepages/8966.htm">Thyroid gland</a></li>
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</ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>References</h2></div><div class="section-button"><button type="submit" aria-controls="section-Ref" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-Ref"><p>Brent GA, Weetman AP. Hypothyroidism and thyroiditis. In: Melmed S, Auchus RJ, Goldfine AB, Koenig RJ, Rosen CJ, eds. <em>Williams Textbook of Endocrinology</em>. 14th ed. Philadelphia, PA: Elsevier; 2020:chap 13.</p><p>Hollenberg A, Wiersinga WM. Hyperthyroid disorders. In: Melmed S, Auchus RJ, Goldfine AB, Koenig RJ, Rosen CJ, eds. <em>Williams Textbook of Endocrinology</em>. 14th ed. Philadelphia, PA: Elsevier; 2020:chap 12.</p><p>Pearce EN, Hollenberg AN. Thyroid. In: Goldman L, Cooney KA, eds. <em>Goldman-Cecil Medicine</em>. 27th ed. Philadelphia, PA: Elsevier; 2024:chap 207.</p><p>Ramos-Levi AM, Marazuela M. Thyroiditis. In: Robertson RP, ed. <em>DeGroot's Endocrinology</em>. 8th ed. Philadelphia, PA: Elsevier; 2023:chap 73.</p><p>Smith JR, Wassner AJ. Thyroiditis. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. <em>Nelson Textbook of Pediatrics</em>. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 582.</p></div></div></section>
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