The fungus that causes tinea versicolor can be found on healthy skin. It only starts causing problems when the fungus overgrows. A number of factors may trigger this growth, including:
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- Hot, humid weather
- Oily skin
- Hormonal changes
- Weakened immune system
- Ferri FF. Tinea versicolor. In: Ferri's Clinical Advisor 2015: 5 Books in 1. Philadelphia, Pa.: Mosby Elsevier; 2015. https://www.clinicalkey.com. Accessed March 9, 2015.
- Goldsmith LA, et al., eds. Yeast infections: Candidiasis, tinea (pityriasis) versicolor and malassezia (pityrosporum) folliculitis. In: Fitzpatrick's Dermatology in General Medicine. 8th ed. New York, N.Y.: The McGraw-Hill Companies; 2012. http://www.accessmedicine.com. Accessed March 9, 2015.
- Bamford J, et al. Interventions for the treatment of pityriasis versicolor. Cochrane Database of Systematic Reviews. http://ovidsp.tx.ovid.com/sp-3.14.0b/ovidweb.cgi. Accessed March 9, 2015.
- AskMayoExpert. Superficial fungal infections. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2012.
- Tinea versicolor. American Academy of Dermatology. www.aad.org/dermatology-a-to-z/diseases-and-treatments/q---t/tinea-versicolor. Accessed March 9, 2015.
- Tinea versicolor. The Merck Manual Professional Edition. http://www.merckmanuals.com/professional/dermatologic_disorders/fungal_skin_infections/tinea_versicolor.html. Accessed March 9, 2015.