An epidermal cyst, or sebaceous cyst, is a sac beneath the outer layer of the skin that is filled with a cheeselike, greasy material (sebum). These cysts most often appear on the scalp, ears, face, back, or scrotum and are caused by plugged ducts at the site of a hair follicle.
Signs and symptoms include a bump or lump under the skin that is:
Medical treatment is usually not needed if the cyst does not cause symptoms. A cyst can be removed if its appearance causes embarrassment or if it becomes injured or infected. If the cyst is infected, antibiotics may be used after the cyst is removed.
|Primary Medical Reviewer||William H. Blahd, Jr., MD, FACEP - Emergency Medicine|
|Specialist Medical Reviewer||H. Michael O'Connor, MD - Emergency Medicine|
|Last Revised||December 27, 2012|
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