Tinea versicolor is a common skin condition due to overgrowth of a skin surface yeast. This overgrowth results in uneven skin color and scaling that can be unsightly and sometimes itch.
Tinea versicolor (pityriasis versicolor) is a chronic, superficial fungal infection that may produce a multicolored rash, commonly on the upper trunk. Primarily a cosmetic defect, it usually affects young people, especially during warm weather, and is most prevalent in tropical countries. Recurrence is common.
Pityrosporum orbiculare (Malassezia furfur) causes tinea versicolor. Whether this condition is infectious or merely a proliferation of normal skin fungi is uncertain.
Usually, the only symptom of tinea versicolor is the white or light brown patches. Patches may scale slightly, but rarely itch or hurt. Other common characteristics of the rash include the following:
Wood's light examination strongly suggests tinea versicolor. Potassium hydroxide test of skin scrapings confirms tinea versicolor by showing hyphae and clusters of yeast.
The most economical and effective treatment is 2.5 % selenium sulfide lotion applied once a day for 7 days. The lotion remains on the skin for 10 minutes and then is rinsed off thoroughly. In persistent cases, therapy may require a single 12-hour application of this lotion, followed by weekly washing with an antifungal soap.
More expensive treatments include topical antifungals, such as econazole, ciclopirox, and oral antifungals, such as itraconazole and ketoconazole.
People with a history of tinea versicolor should attempt to avoid excessive heat or sweating. In addition, a dandruff shampoo applied to the skin area for 10 minutes each week may help prevent recurrences.
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