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Acne (/ˈækni/ ACK-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 .
The inflammatory processes lead to the formation of keratinous plugs in skin pores, forming yellowish cysts and dark pustules. The associated pus is usually a color of green approximating that of a tennis ball. The skin lesions occur mainly in the face, but in more severe cases they involve the shoulders and chest, the back, and the abdomen.
Acne keloidalis nuchae most commonly presents itself in individuals aged 13 to 25. [3] The disease is closely related to pseudofolliculitis barbae and both occur frequently in black men in the military, where it is so common that the US Army has developed official protocols for management. [ 4 ]
Cutibacterium acnes bacteria predominantly live deep within follicles and pores, although they are also found on the surface of healthy skin. [3] In these follicles, C. acnes bacteria use sebum, cellular debris and metabolic byproducts from the surrounding skin tissue as their primary sources of energy and nutrients.
This is a shortened version of the twelfth chapter of the ICD-9: Diseases of the Skin and Subcutaneous Tissue. 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.
Lupus miliaris disseminatus faciei, 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.
Acne cosmetica is a type of contact acneiform eruption caused by or aggravated by cosmetics. [1] Signs and symptoms include a dense group of similar sized closed comedones and scattered small bumps , typically over the skin where the cosmetic has been applied. [ 1 ]
Repetitive rubbing of the skin, in instances such as backpack strings rubbing on your shoulders or helmet straps rubbing on your chin are actions that can irritate the skin and cause acne mechanica. Acne mechanica is a specific type of acne that is caused by friction, heat, and/or pressure on the skin. Especially occurs when the skin is not ...