Home treatment for a lump, such as a sebaceous (epidermal) cyst, may relieve symptoms but may not make the cyst go away. A sebaceous cyst is a sac filled with a cheeselike, greasy material (sebum) caused by plugged ducts at the site of a hair follicle. Sebaceous cysts most often appear on the scalp, ears, face, back, or scrotum. Hormone stimulation or injury may cause them to enlarge or become infected.
Signs and symptoms include a bump or lump under the skin that is:
Firm and easily moveable.
Yellow, white, or flesh-colored. It can turn bright red if injured or infected.
Painless (but can be painful if injured or infected).
1 in. (2.5 cm) or smaller to 4 in. (10.2 cm).
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