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Tinea versicolor
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==Signs and symptoms== [[File:Pityriasis versicolor frontal retouche.jpg|thumb|right|Pityriasis versicolor commonly causes [[hypopigmentation]], visible in people with dark skin tones.]] [[File:Malassezia spores 2.jpg|thumb|upright=1.2|Pityriasis versicolor in a man and electron micrograph of his skin showing round ''[[Malassezia]]'' spores (S)<ref>{{cite book |doi=10.5772/61850 |isbn=978-953-51-2252-4 |chapter=Observation of Fungi, Bacteria, and Parasites in Clinical Skin Samples Using Scanning Electron Microscopy |author=Ran Yuping |title=Modern Electron Microscopy in Physical and Life Sciences |editor=Janecek, Milos |editor2=Kral, Robert |publisher=InTech |year=2016|s2cid=53472683 }}</ref><!-- This is content from a predatory publisher (intechopen.com); recommend finding an alternative source for a comparable image, but I hesitate to remove the image at this time. -->]] The signs of this condition include: * Occasional fine scaling of the skin producing a very superficial ash-like scale * Pale, dark tan, or pink in color, with a reddish undertone that can darken when the patient is overheated, such as in a hot shower or during/after exercise. Tanning typically makes the affected areas contrast more starkly with the surrounding skin.<ref>{{cite web|url=http://tineaversicolor.us/whattoavoid.html|archive-url=https://web.archive.org/web/20130727011050/http://tineaversicolor.us/whattoavoid.html|title=What to Avoid While Treating Tinea Versicolor|access-date=2013-01-05|archive-date=2013-07-27|url-status=dead}}</ref> * Sharp border<ref name="dermnetnz.org">[http://www.dermnetnz.org/fungal/pityriasis-versicolor.html Pityriasis versicolor | DermNet New Zealand] {{Webarchive|url=https://web.archive.org/web/20160718170132/http://www.dermnetnz.org/fungal/pityriasis-versicolor.html |date=2016-07-18 }}. Dermnetnz.org. Retrieved on 2016-10-14.</ref> Pityriasis versicolor is more common in hot, humid climates or in those who sweat heavily, so it may recur each summer.<ref name="dermnetnz.org"/> <!-- Sometimes severe "pin-prick" itching in the affected areas; usually when the person's body temperature is elevated by exercise or a hot/warm environment, but the person hasn't started sweating yet. Once sweating begins the "pin-prick" itching subsides.{{Citation needed|date=June 2008}} β dubious, ?OR - needs good 2nd source citation else remove --> The yeasts can often be seen under the microscope within the lesions and typically have a so-called "spaghetti and meatball appearance"<ref name="urlAdolescent Health Curriculum - Medical Problems - Dermatology - Papulosquamous Lesions (B4)">{{cite web |url=http://www.usc.edu/student-affairs/Health_Center/adolhealth/content/b4derm4.html |title=Adolescent Health Curriculum β Medical Problems β Dermatology β Papulosquamous Lesions (B4) |access-date=2008-12-10 |archive-date=2008-11-28 |archive-url=https://web.archive.org/web/20081128071221/http://www.usc.edu/student-affairs/Health_Center/adolhealth/content/b4derm4.html |url-status=dead }}</ref> as the round yeasts produce filaments. In people with dark skin tones, pigmentary changes such as [[hypopigmentation]] (loss of color) are common, while in those with lighter skin color, [[hyperpigmentation]] (increase in skin color) is more common. Because infected skin tans less than uninfected skin, resulting in uneven tanning, the term "sun fungus" is sometimes used.<ref name="urlTioconazole (Topical Route) - MayoClinic.com">{{cite web |url=http://www.mayoclinic.com/health/drug-information/DR601345 |title=Tioconazole (Topical Route) β MayoClinic.com |access-date=2008-12-10 |archive-date=2014-01-01 |archive-url=https://web.archive.org/web/20140101201307/http://www.mayoclinic.com/health/drug-information/DR601345 |url-status=live }}</ref><ref>{{Cite web |last=Lehrer |first=Michael |access-date=2024-05-15 |title=Tinea Versicolor (Pityriasis Versicolor) |url=https://www.cedars-sinai.org/health-library/diseases-and-conditions/t/tinea-versicolor-pityriasis-versicolor.html |website=Cedars Sinai Health Library}}</ref>
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