A chronic inflammatory disease of the sebaceous glands and hair follicles of the skin characterized by comedones, papules, and pustules. In severe acne, cysts and nodules may develop and scarring is common.
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A compacted mass of dead skin cells and skin oils. Visible as a small white bump under the surface of the skin.
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Pertaining to the skin.
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A pocket-like structure, generally filled with fluid or semisolid. material.
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Swelling in tissue due to accumulation of fluid.
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Outer layer of skin.
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Indentation of epidermis containing hair shaft, sebaceous gland and adjacent muscle.
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A small, sac-like cavity for secretion or excretion.
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Abnormally increased pigmentation.
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Abnormally diminished pigmentation, resulting from diminished melanin (dark pigment) production.
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A protein which is found in hair, nails and the outermost skin layer.
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The buildup of sebum and other materials from your skin (cells, pigment and bacteria) under the skin's surface. This is how acne begins.
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A small knot, knob, protuberance, or swelling.
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A term used to describe any substance that will not clog pores (such as cosmetic products).
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A visible enlarged pore filled with a plug of dead skin cells and skin oil. The dark color results from materials in the follicle, not dirt.
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A pimple, formed from a plugged follicle due to release of its contents (cells, oils, bacteria) into the surrounding tissue. Usually reddened, tender and swollen.
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Located in all skin areas except the palms of the hands and soles of the feet, pilosebaceous units consist of sebaceous glands and hair follicles, which are physically connected and usually vary inversely in size.
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A small inflamed elevation of the skin.
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A tiny microscopic opening of follicles on to the surface of the skin.
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Pus-filled inflammatory acne lesion caused by the body's white cells attacking the plugged follicle.
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Oil-producing gland.
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Oil on the skin produced by sebaceous (oil-producing) glands.
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Slang for pimple (origin unknown).
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