Pale eruptions on skin of trunk, head, and tops of limbs caused by yeast. See Malassezia Furfur, Yeast General, Fungus General and other yeast programs.Encyclopedia Entry for Tinea Versicolor :Tinea versicolor- Pityriasis versicolor- Malassezia furfur (fungus)Encyclopedia Entry for Tinea Versicolor :Tinea versicolor. Tinea versicolor is fairly common. It is caused by a type of fungus called Malassezia. This fungus is normally found on human skin. It only causes a problem in certain settings. The condition is most common in adolescents and young adults. It typically occurs in hot climates. It does not spread person to person.The main symptom is patches of discolored skin that: Have sharp borders (edges) and fine scales Are often dark reddish to tan in color Are found on the back, underarms, upper arms, chest, and neck Do not darken in the sun so may appear lighter than the surrounding healthy skin African Americans may have a loss of skin color or an increase in skin color. Other symptoms include: Increased sweating Itching.Your health care provider will examine a skin scraping under a microscope to look for the fungus. A skin biopsy may also be performed with a special stain called PAS to identify fungus and yeast.The condition is treated with antifungal medicine that is either applied to the skin or taken by mouth. Applying over-the-counter dandruff shampoo containing selenium sulfide or ketoconazole to the skin for 10 minutes each day in the shower is another treatment option.Tinea versicolor is easy to treat. Changes in skin color may last for months. The condition may come back during warm weather.Call your provider if you develop symptoms of tinea versicolor.Avoid excessive heat or sweating if you have had this condition in the past. You can also use anti-dandruff shampoo on your skin every month to help prevent the problem. .Pityriasis versicolor.Tinea versicolor - close-up Tinea versicolor - close-up Tinea versicolor - shoulders Tinea versicolor - shoulders Tinea versicolor - close-up Tinea versicolor - close-up Tinea versicolor on the back Tinea versicolor on the back Tinea versicolor - back Tinea versicolor - back.Gupta AK, Copper EA, Simpson FC. Tinea versicolor (pityriasis versicolor).Encyclopedia Entry for Tinea Versicolor :Tinea versicolor (Pityriasis versicolor). Source of disease: Malassezia species