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 ?
In this study, we report a heterozygous missense mutation and a splice site mutation in the PSENEN gene in two Chinese AI families with clinical manifestation of familial multiple comedones and Dowling-Degos disease (DDD).
2) The resulting lesions include noninflammatory open (blackheads) and closed (whiteheads) comedones, as well as inflammatory papules, pustules, and nodules.
Tretinoin, a type of drug called a retinoid that contains vitamin A, is the most effective topical medication for stopping the development of new comedones.
It is characterized by seborrhoea, the formation of open and closed comedones, erythematous papules and pustules and in more severe cases nodules, deep pustules and pseudocysts.
Non-inflamed lesions or comedones, inflamed lesions, and/or scars characterize acne occurring on the face, chest, shoulders, or upper arms.
Isotretinoin gel produced significantly greater reductions in total lesion counts and comedone counts than topical adapalene.
Clinical Features (4): Acne vulgaris is characterized by comedones, papules, pustules, and nodules in a sebaceous distribution (e.
Acne vulgaris is a chronic, inflammatory disease of pilosebaceous units, characterized by comedones, papules, pustules, nodules, and often scars.
In a large retrospective case series, various skin abnormalities such as follicular papules, comedones, hypertrophic pilosebaceous units, angiokeratoma of Fordyce, leucoderma macules, and haemangiomas have been shown to be associated with NLCS.
However, contrary to acne comedones the material cannot be easily removed mechanically [4].
Comedo Extraction: It may temporarily help those with comedones that do not improve with standard treatment.
Under good light and without touching, all the manifestations of acne ranging from comedones to nodule were recorded.