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Epidermoid cyst signs and symptoms include:

  • A small, round bump under the skin, usually on the face, trunk or neck
  • A tiny blackhead plugging the central opening of the cyst
  • A thick, yellow, foul-smelling material that sometimes drains from the cyst
  • Redness, swelling and tenderness in the area, if inflamed or infected

When to see a doctor

Most epidermoid cysts don't cause problems or need treatment. See your doctor if you have one that:

  • Grows rapidly
  • Ruptures or becomes painful or infected
  • Occurs in a spot that's constantly irritated
  • Bothers you for cosmetic reasons
May. 29, 2014

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