WordNet
- a small inflamed elevation of the skin; a pustule or papule; common symptom in acne (同)hickey, zit
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- にきび
- にきび
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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/05/20 13:55:41」(JST)
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"Blackhead" redirects here. For other uses, see Blackhead (disambiguation).
Comedo (Latin for glutton, plural comedones) is the primary sign of acne and consists of a widened hair follicle filled with keratin skin debris, bacteria, and sebum (oil).[1] A comedo may be open (commonly called blackhead[2]) or closed (commonly called whitehead).
Blackheads [edit]
| Blackhead |
| Classification and external resources |
A high resolution macro shot of a blackhead found on a male's face. |
| ICD-9 |
706.1 |
A male with blackheads on his nose
A blackhead is a yellow or blackish bump or plug on the skin, usually found on the face or the back. Blackheads are one of the common findings in acne vulgaris.[3] Contrary to the common belief that it is caused by poor hygiene, blackheads are caused by excess oils that have accumulated in the sebaceous gland's duct. The substance found in these bumps mostly consists of keratin and modified sebum (an oily secretion of the sebaceous gland), which darkens as it oxidizes. Clogged hair follicles, where blackheads often occur, reflect light irregularly to produce a blackhead's "black" hue.[4] For this reason, the blockage might not necessarily look black when extracted from the pore, but may have a more yellow-brown colour as a result of its melanin content.
Whiteheads [edit]
A whitehead (more commonly known as a pimple) is a non inflamed pore blocked with sebum, a symptom of acne vulgaris. In contrast to a blackhead, a whitehead is a follicle that is filled with the same material, sebum, but lacks a small opening to the skin surface. Since the air cannot reach the follicle, the material is not oxidized, and remains white.[5]
References [edit]
- ^ "Definition of Comedo". Medicine.net. 2012-03-19.
- ^ "Definition of Blackhead". Medicine.net. 1999-11-09.
- ^ Morris-Jones, edited by Paul K. Buxton, Rachael (2009). ABC of dermatology (5th ed. ed.). Chichester, West Sussex, UK: Wiley-Blackwell. p. 86. ISBN 978-1-4051-7065-9.
- ^ "Blackheads (comedones)". About.com. 2008-04-14.
- ^ "Definition of whitehead". eMedicineHealth.com. 1999-11-09.
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Disorders of skin appendages (L60–L75, 703–706)
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| Nail |
- thickness: Onychogryphosis
- Onychauxis
- color: Beau's lines
- Yellow nail syndrome
- Leukonychia
- Azure Lunula
- shape: Koilonychia
- Nail clubbing
- behavior: Onychotillomania
- Onychophagia
- other: Ingrown nail
- Anonychia
- ungrouped: Paronychia
- Acute paronychia
- Chronic paronychia
- Chevron nail
- Congenital onychodysplasia of the index fingers
- Green nails
- Half and half nails
- Hangnail
- Hapalonychia
- Hook nail
- Lichen planus of the nails
- Longitudinal erythronychia
- Malalignment of the nail plate
- Median nail dystrophy
- Mees' lines
- Melanonychia
- Muehrcke's lines
- Nail–patella syndrome
- Onychoatrophy
- Onychocryptosis
- Onycholysis
- Onychomadesis
- Onychomatricoma
- Onychomycosis
- Onychophosis
- Onychoptosis defluvium
- Onychorrhexis
- Onychoschizia
- Platonychia
- Pincer nails
- Plummer's nail
- Psoriatic nails
- Pterygium inversum unguis
- Pterygium unguis
- Purpura of the nail bed
- Racquet nail
- Red lunulae
- Shell nail syndrome
- Splinter hemorrhage
- Spotted lunulae
- Staining of the nail plate
- Stippled nails
- Subungual hematoma
- Terry's nails
- Twenty-nail dystrophy
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| Hair |
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| Sweat glands |
| Eccrine |
- Miliaria
- Colloid milium
- Miliaria crystalline
- Miliaria profunda
- Miliaria pustulosa
- Miliaria rubra
- Occlusion miliaria
- Postmiliarial hypohidrosis
- Granulosis rubra nasi
- Ross’ syndrome
- Anhidrosis
- Hyperhidrosis
- Generalized
- Gustatory
- Palmoplantar
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| Apocrine |
- Body odor
- Chromhidrosis
- Fox–Fordyce disease
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| Sebaceous |
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noco/cong/tumr, sysi/epon
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UpToDate Contents
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English Journal
- Clinical significance of neutrophil gelatinase-associated lipocalin and galectin-7 in tape-stripped stratum corneum of acne vulgaris.
- Watanabe K1, Yoshino T2, Takahashi M1, Kondo S2, Takahashi M2, Matsukuma S2, Mukai H1, Fukuda H1.
- The Journal of dermatology.J Dermatol.2018 May;45(5):618-621. doi: 10.1111/1346-8138.14261. Epub 2018 Feb 22.
- PMID 29473202
- Chemical peels for acne vulgaris: a systematic review of randomised controlled trials.
- Chen X1, Wang S1, Yang M2, Li L1.
- BMJ open.BMJ Open.2018 Apr 28;8(4):e019607. doi: 10.1136/bmjopen-2017-019607.
- PMID 29705755
- A comparative study of biological and metabolic biomarkers between healthy individuals and patients with acne vulgaris: A cross-sectional study protocol.
- Kim K1, Ha I, Kim E, Kim K.
- Medicine.Medicine (Baltimore).2017 Nov;96(45):e8554. doi: 10.1097/MD.0000000000008554.
- PMID 29137071
Japanese Journal
- Ｎｅｖｕｓ ｃｏｍｅｄｏｎｉｃｕｓ ｓｙｎｄｒｏｍｅの１例
Related Links
- Comedonal acne. Authoritative facts about the skin from DermNet New Zealand. ... What is comedonal acne? Comedonal acne is a pattern of acne in which most lesions are comedones. Comedonal acne most often affects the ...
- Picture of Psoriasis A reddish, scaly rash often located over the surfaces of the elbows, knees, scalp, and around or in the ears, navel, genitals or buttocks... ... Comedones: The plural of comedo, the primary sign of acne, consisting ...
Related Pictures
![[Acne] Closed comedone issues for years. Any suggestions? | Comedone, Acne, Skin care](https://1mg.info/0/u/i/2600.jpg)
★リンクテーブル★
[★]
- 日
- めんほう
- 英
- comedone、comedo、pimple
- 関
- 面疱、ざ瘡
[★]
- 関
- comedo、comedone
[★]
- 英
- comedo、comedone、pimple
- 関
- 面皰