A sebaceous cyst is a catch-all term for a benign, harmless growth that occurs under the skin and tends to be smooth to the touch. Ranging in size, sebaceous cysts are usually found on the scalp, face, ears, and genitals. Frequently the openings to the gland can be blocked and preventing the sebum from being discharged onto the skin surface. This causes a build-up cheesy-material under the skin. Unless they become infected and painful or large, sebaceous cysts do not require medical attention or treatment, and usually go away on their own.
Almost everyone has at least 1 or 2 sebaceous cysts.