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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">Seborrheic keratosis</h1>
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</noscript></div><div class="main"><div id="ency_summary"><p>Seborrheic keratosis is a condition that causes wart-like growths on the skin. The growths are noncancerous (<a test="test" href="./002236.htm">benign</a>). </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>A seborrheic keratosis is a benign form of skin <a test="test" href="./001310.htm">tumor</a>. The cause is unknown.</p><p>The condition commonly appears after age 40. It tends to run in families.</p><img title="Irritated Seborrheic Kerotosis - neck" alt="Irritated Seborrheic Kerotosis - neck" src="//medlineplus.gov/ency/images/ency/fullsize/3208.jpg" class="img-e" itemprop="image"/></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>Symptoms of seborrheic keratosis are skin growths that:</p><ul><li>Are located on the face, chest, shoulders, back, or other areas, except the lips, palms, and soles</li><li>Are painless, but may become irritated and <a test="test" href="./003217.htm">itchy</a></li><li>Are most often tan, brown, or black</li><li>Have a slightly raised, flat surface</li><li>May have a rough texture (like a wart)</li><li>Often have a waxy surface</li><li>Are round or oval</li><li>May look like a piece of bee's wax that has been "pasted-on" the skin</li><li>Often appear in clusters </li></ul></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>Your health care provider will look at the growths to determine if you have the condition. You may need a <a test="test" href="./003840.htm">skin biopsy</a> to confirm the diagnosis.</p></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>You generally do not need treatment unless growths get irritated or affect your appearance.</p><p>Growths may be removed with <a test="test" href="./007673.htm">surgery</a> or freezing (<a test="test" href="./007506.htm">cryotherapy</a>).</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>Removing the growths is simple and generally does not cause scars. You may have patches of lighter skin where growths on the torso have been removed.</p><p>Growths usually do not return after they are removed. You may develop more growths in the future if you are prone to the condition.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Possible Complications</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>These complications may occur:</p><ul><li>Irritation, bleeding, or discomfort of growths</li><li>Mistake in diagnosis (growths may look like <a test="test" href="./000850.htm">skin cancer</a> tumors)</li><li>Distress due to physical appearance</li></ul></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-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>Contact your provider if you have symptoms of seborrheic keratosis.</p><p>Also contact if you have new symptoms, such as:</p><ul><li>A change in the appearance of the skin growth</li><li>New growths</li><li>A growth that looks like seborrheic keratosis, but occurs by itself or has ragged borders and irregular color. Your provider will need to examine it for skin cancer.</li></ul></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>Benign skin tumors - keratosis; Keratosis - seborrheic; Senile keratosis; Senile verruca</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/3208t.jpg" alt="Irritated Seborrheic Kerotosis - neck" title="Irritated Seborrheic Kerotosis - neck" class="side-img"/><a href="../imagepages/3208.htm">Irritated Seborrheic Kerotosis - neck</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>Fitzpatrick JE, High WA, Kyle WL. Papillomatous and verrucous lesions. In: Fitzpatrick JE, High WA, Kyle WL, eds. <em>Urgent Care Dermatology: Symptom-Based Diagnosis</em>. Philadelphia, PA: Elsevier; 2018:chap 28.</p><p>James WD, Elston DM, Treat JR, Rosenbach MA, Neuhaus IM. Epidermal nevi, neoplasms, and cysts. In: James WD, Elston DM, Treat JR, Rosenbach MA, Neuhaus IM, eds. <em>Andrews' Diseases of the Skin: Clinical Dermatology</em>. 13th ed. Philadelphia, PA: Elsevier; 2020:chap 29.</p><p>Marks JG, Miller JJ. Epidermal growths. In: Marks JG, Miller JJ, eds. <em>Lookingbill and Marks' Principles of Dermatology</em>. 6th ed. Philadelphia, PA: Elsevier; 2019:chap 5.</p><p>Patterson JW. Tumors of the epidermis. In: Patterson JW, ed. <em>Weedon's Skin Pathology</em>. 5th ed. Philadelphia, PA: Elsevier Limited; 2021:chap 32.</p><p>Requena L, Requena C, Cockerell CJ. Benign epidermal tumors and proliferations. In: Bolognia JL, Schaffer JV, Cerroni L, eds. <em>Dermatology</em>. 4th ed. Philadelphia, PA: Elsevier; 2018:chap 109.</p></div></div></section>
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<section><div class="section"><div class="section-header"><div class="section-title"><h2>Review Date 11/18/2022</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: Elika Hoss, MD, Assistant Professor of Dermatology, Mayo Clinic, Scottsdale, AZ. 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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