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Sebaceous Cyst

Basics

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Definition

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

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Symptoms

The main symptom is usually a small, non-painful lump beneath the skin. However, if it becomes infected, you may have redness, tenderness, or increased temperature of the skin over the area.

Grayish-white, cheesy, foul-smelling material may drain from the cyst.

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