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<p>A sebaceous cyst is a closed sac under the skin filled with a cheese-like or oily material.</p>

<h2><a id="Causes" name="Causes">Causes</a></h2>

<p>Sebaceous cysts most often arise from swollen hair follicles. Skin trauma can also&nbsp;cause a cyst to form. A sac of cells is created into which a protein called keratin is secreted.</p>

<p>&nbsp;</p>

<h2><a id="Symptoms" name="Symptoms">Symptoms</a></h2>

<p>The main symptom is usually a small, non-painful lump beneath the skin. The lump is usually found on the face, neck and trunk. It usually grows slowly and is not painful.</p>

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<p>If the lump becomes infected or inflamed, other symptoms may include:</p>

<ul>
	<li>Skin redness</li>
	<li>Tender or sore skin</li>
	<li>Warm skin in the affected area</li>
	<li>Grayish-white, cheesy, foul-smelling material that drains from the cyst</li>
</ul>

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<h2><a id="Exams and Tests" name="Exams and Tests">Exams and Tests</a></h2>

<p>In most cases, your doctor can make a diagnosis&nbsp;by examining your skin. Sometimes, a&nbsp;biopsy&nbsp;may be needed to rule out other conditions.</p>

<p>&nbsp;</p>

<h2><a id="Treatment" name="Treatment">Treatment</a></h2>

<p>Sebaceous cysts are not dangerous and can usually be ignored. Placing a warm moist cloth (compress) over the area may help the cyst drain and heal.</p>

<p>If you have a small inflamed cyst, your doctor may inject it with a steroid medicine that reduces swelling.</p>

<p>If the cyst becomes swollen, tender, or large, your doctor may drain it or perform surgery to remove it.</p>

<p>&nbsp;</p>

<h2><a id="Possible Complications" name="Possible Complications">Possible Complications</a></h2>

<p>Cysts may become infected and form painful&nbsp;<a href="http://www.zdrav.kz/node/10009">abscesses</a>.</p>

<p>Cysts may return, even&nbsp;after they are surgically removed.</p>

<p>&nbsp;</p>

<h2><a id="When to Contact a Medical Professional" name="When to Contact a Medical Professional">When to Contact a Medical Professional</a></h2>

<p>Call your health care provider if you notice any new growths on your body. Although cysts are not dangerous, your doctor should examine you for signs of skin&nbsp;<a href="http://www.zdrav.kz/en/node/10162">cancer</a>.</p>

<p>&nbsp;</p>

<h2><a id="Alternative Names" name="Alternative Names">Alternative Names</a></h2>

<p>Epidermal cyst; Keratin cyst; Epidermoid cyst; Epidermal inclusion cyst</p>

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<p>Источник:&nbsp;<a href="http://www.nlm.nih.gov/medlineplus/ency/article/000842.htm">http://www.nlm.nih.gov/medlineplus/ency/article/000842.htm</a></p>

<p>Facial Swelling, Acne, Allergy (<a href="http://symptomaster.com/client/main?user_action=user_action_from_external_url&amp;need_auth_guest=1&amp;external_symptom_id=2316&amp;gender_id=1" target="_blank">male</a>&nbsp;|&nbsp;<a href="http://symptomaster.com/client/main?user_action=user_action_from_external_url&amp;need_auth_guest=1&amp;external_symptom_id=2316&amp;gender_id=2" target="_blank">female</a>)</p>
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