Comedo
A comedo is a clogged hair follicle (pore) in the skin.Keratin (skin debris) combines with oil to block the follicle. A comedo can be open (blackhead) or closed by skin (whitehead), and occur with or without acne. The word comedo comes from Latin to suggest the worm-like look of a blackhead that has been secreted. The plural of comedo is comedones.
The chronic inflammatory condition that usually includes both comedones and inflamed papules and pustules (pimples) is called acne. Infection causes inflammation and the development of pus. Whether or not a skin condition classifies as acne depends on the amount of comedones and infection. Comedones should not be confused with sebaceous filaments.
Comedo-type ductal carcinoma in situ (DCIS) is not related to the skin conditions discussed here. DCIS is a non-invasive form of breast cancer, but comedo-type DCIS may be more aggressive and so may be more likely to become invasive.
Causes
Oil production in the sebaceous glands increases during puberty, causing comedones and acne to be common in teenagers. Acne is also found pre-menstrually and in women with polycystic ovarian syndrome. Smoking may worsen acne.
Blackhead (disambiguation)
Blackhead can refer to:
In biology:
Place names:
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Blackhead (New York)
Blackhead is a mountain located in Greene County, New York. The mountain is part of the Blackhead range of the Catskill Mountains. Blackhead is flanked to the northeast by Black Dome.
Blackhead stands within the watershed of the Hudson River, which drains into New York Bay. The southwest side of Blackhead drains into East Kill, thence into Schoharie Creek, the Mohawk River, and the Hudson River. The north side of Blackhead drains into the headwaters of Batavia Kill, and thence into Schoharie Creek. The east side of Blackhead drains into Trout Brook, thence into Shingle Kill, Catskill Creek, and the Hudson River.
Blackhead is within New York's Catskill Park. The Long Path, a 350-mile (560 km) long-distance hiking trail from New York City to Albany, is contiguous with the Escarpment Trail.
See also
References
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