blackhead

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blackhead,

yellowish or blackish plug of material accumulated in the duct of a sebaceous gland. The material consists of keratin (horny cells of the epidermis) and modified sebum (oily secretions of the sebaceous gland). Blackheads are the primary lesions in acneacne,
common inflammatory disease of the hair follicles and sebaceous glands characterized by blackheads, whiteheads, pustules, nodules and, in the more severe forms, by cysts and scarring. The lesions appear on the face, neck, back, chest, and arms.
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. Treatment is the same as for acne, with frequent cleansing of the skin followed by the application of astringent solutions. Plugs should be extracted only by a physician, since damage to the surrounding tissues occasioned by squeezing often leads to scarring.

blackhead

[′blak‚hed]
(medicine)

blackhead

1. a black-tipped plug of fatty matter clogging a pore of the skin, esp the duct of a sebaceous gland
2. an infectious and often fatal disease of turkeys and some other fowl caused by the parasitic protozoa Histomonas meleagridis
3. any of various birds, esp gulls or ducks, with black plumage on the head
References in periodicals archive ?
The basic acne lesion, called the comedo (kom'-e-do) or comedone, is simply an enlarged hair follicle plugged with oil and bacteria.
The hallmark of TCDD toxicity in humans is chloracne (Panteleyev and Bickers 2006), characterized by epidermal acanthosis and hyperkeratosis, and hyperkeratinization and metaplasia of the sebaceous glands, with comedone formation.
Jaggi Rao, MD, Board Certified Dermatologist and Associate Clinical Professor of Medicine at the University of Alberta stated, "In my research with Duality MD and the JMSR Skin Care Management System, I've found the results comparable to prescription topical solutions for improvement in inflammation as well as comedone numbers, and without any of the common side effects.