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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">Thirst - excessive</h1>
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</noscript></div><div class="main"><div id="ency_summary"><p>Excessive thirst is an abnormal feeling of always needing to drink fluids.</p></div><section><div class="section"><div class="section-header"><div class="section-title"><h2>Considerations</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>Drinking lots of water is healthy in most cases. The urge to drink too much may be the result of a physical or emotional disease. Excessive thirst may be a symptom of high blood sugar (hyperglycemia), which may be due to <a test="test" href="./001214.htm">diabetes</a>.</p><p>Excessive thirst is a common symptom. It is often the reaction to fluid loss during exercise or to eating salty foods.</p></div></div></section><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-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>Causes may include:</p><ul><li>A recent salty or spicy meal</li><li>Bleeding enough to cause a large decrease in blood volume</li><li>Diabetes mellitus</li><li><a test="test" href="./000377.htm">Diabetes insipidus</a></li><li>Medicines such as anticholinergics, demeclocycline, diuretics, phenothiazines</li><li>Loss of body fluids from the bloodstream into the tissues due to conditions such as severe infections (<a test="test" href="./000666.htm">sepsis</a>) or burns, or heart, liver, or kidney failure</li><li>Psychogenic polydipsia (a mental disorder)</li></ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Home Care</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>Because thirst is the body's signal to replace water loss, it is most often appropriate to drink liquids until the thirst sensation is gone.</p><p>For thirst caused by diabetes, follow the prescribed treatment to properly control your <a test="test" href="./003482.htm">blood sugar level</a>.</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-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>Contact your health care provider if:</p><ul><li>Excessive thirst is ongoing and unexplained.</li><li>Thirst is accompanied by other unexplained symptoms, such as blurry vision or fatigue.</li><li>You are passing more than 5 quarts (4.73 liters) of urine per day. </li></ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>What to Expect at Your Office Visit</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 provider will get your medical history and perform a physical exam.</p><p>The provider may ask you questions such as:</p><ul><li>How long have you been aware of having increased thirst? Did it develop suddenly or slowly?</li><li>Does your thirst stay the same all day?</li><li>Did you change your diet? Are you eating more salty or spicy foods?</li><li>Have you noticed an <a test="test" href="./003134.htm">increased appetite</a>?</li><li>Have you <a test="test" href="./003107.htm">lost</a> weight or <a test="test" href="./003084.htm">gained weight</a> without trying?</li><li>Has your activity level increased?</li><li>What other symptoms are happening at the same time?</li><li>Have you recently suffered a burn or other injury?</li><li>Are you urinating more or less frequently than usual? Are you producing more or less urine than usual? Have you noticed any bleeding?</li><li>Are you sweating more than usual?</li><li>Is there any swelling in your body?</li><li>Do you have a <a test="test" href="./003090.htm">fever</a>? </li></ul><p>Tests that may be ordered include the following:</p><ul><li>Blood glucose level</li><li><a test="test" href="./003642.htm">CBC</a> and white <a test="test" href="./003657.htm">blood cell differential</a></li><li><a test="test" href="./003477.htm">Serum calcium</a></li><li><a test="test" href="./003463.htm">Serum osmolality</a></li><li><a test="test" href="./003481.htm">Serum sodium</a></li><li><a test="test" href="./003579.htm">Urinalysis</a></li><li><a test="test" href="./003609.htm">Urine osmolality</a></li></ul><p>Your provider will recommend treatment if needed based on your exam and tests. For example, if tests show you have diabetes, you will need to get treated.</p><p>A very strong, constant urge to drink may be the sign of a psychological problem. You may need a psychological evaluation if the provider suspects this is a cause. Your fluid intake and output will be closely watched.</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>Increased thirst; Polydipsia; Excessive thirst</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/8888t.jpg" alt="Insulin production and diabetes" title="Insulin production and diabetes" class="side-img"/><a href="../imagepages/8888.htm">Insulin production and diabetes</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>Al-Awqati Q. Disorders of sodium and water homeostasis. In: Goldman L, Schafer AI, eds. <em>Goldman-Cecil Medicine</em>. 26th ed. Philadelphia, PA: Elsevier; 2020:chap 108.</p><p>Guber HA, Oprea M, Russell YX. Evaluation of endocrine function. In: McPherson RA, Pincus MR, eds. <em>Henry's Clinical Diagnosis and Management by Laboratory Methods</em>. 24th ed. Philadelphia, PA: Elsevier; 2022:chap 25.</p><p>Verbalis JG. Disorders of water balance. In: Yu ASL, Chertow GM, Luyckx VA, Marsden PA, Skorecki K, Taal MW, eds. <em>Brenner and Rector's The Kidney</em>. 11th ed. Philadelphia, PA: Elsevier; 2020:chap 15.</p></div></div></section>
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<section><div class="section"><div class="section-header"><div class="section-title"><h2>Review Date 2/2/2023</h2></div><div class="section-button"><button type="submit" aria-controls="section-version" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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<div id="section-version" class="section-body"><p>Updated by: Linda J. Vorvick, MD, Clinical Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. </p>
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