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It covers ICD codes 680 to 709. The full chapter can be found on pages 379 to 393 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1. Both volumes can be downloaded for free from the website of the World Health Organization.
Acne (/ ˈ æ k n i / ⓘ AK-nee), also known as acne vulgaris, is a long-term skin condition that occurs when dead skin cells and oil from the skin clog hair follicles. [10] Typical features of the condition include blackheads or whiteheads , pimples , oily skin, and possible scarring .
[18] [19] Acne vulgaris is the disease most commonly associated with C. acnes infection. [ citation needed ] Cutibacterium acnes is one of the most common and universal skin diseases, affecting more than 45 million individuals in the United States. 20% of all dermatologist visits are related to treating acne-related issues.
Severe acne usually indicates the necessity of prescription medication to treat the pimples. Prescription medications used to treat acne and pimples include isotretinoin , which is a retinoid , anti-seborrheic medications, anti-androgen medications, hormonal treatments, alpha hydroxy acid , azelaic acid , and keratolytic soaps.
The dermis is the layer of skin between the epidermis and subcutaneous tissue, and comprises two sections, the papillary dermis and the reticular dermis. [10] The superficial papillary dermis interdigitates with the overlying rete ridges of the epidermis, between which the two layers interact through the basement membrane zone. [ 10 ]
Sycosis vulgaris, sycosis barbae, or barber's itch is a staphylococcal infection of the hair follicles in the bearded area of the face, usually the upper lip. Shaving aggravates the condition. Gram-negative folliculitis may appear after prolonged acne treatment with antibiotics. [4]
Tropical acne is unusually severe acne occurring in the tropics during seasons when the weather is hot and humid. [1] [2]: 500 Skin conditions including acne are seen with more frequency in dermatological consultations in hot and humid climates, where bacterial and fungal infections are more common, than in drier climates.
Lupus miliaris disseminatus faciei (LMDF), also known as acne agminata, is a disease with a similar appearance to acne vulgaris. [1] [2] The cause of LMDF is unknown.LMDF usually occurs on the face, but extrafacial presentations have been reported.