Tinea versicolor, also referred to as pityriasis versicolor, is a fungal infection affecting the skin. The common skin condition is an overgrowth of yeast on the surface of the skin and causes pigment changes. An individual affected by tinea versicolor can treat the condition easily at home but may have pigment changes in the skin that last for several months following successful treatment, according to Medline Plus.
Cause
The fungus Pityrosporum ovale causes a tinea versicolor infection. This yeast occurs normally on human skin, but can be aggravated and begin to overgrow. Certain conditions that may cause the overgrowth of the fungus include hot and humid weather, hormonal changes, excessive perspiration and oily skin. Individuals with suppressed immune symptoms have a higher risk for developing an overgrowth of the fungus.
Symptoms
Tinea veriscolor causes a change in pigmentation in skin due to a thin layer of fungus covering the skin. The pigment changes in the skin may appear white, tan, pink or dark brown. The skin in the affected area may appear scaly. Individuals with dark skin tones may experience more obvious pigment changes than people with fair skin. Common areas of the body affected by the infection include the back, chest, neck and the upper portion of the arms, according to the Mayo Clinic. The condition may also occur on the face.
Diagnosis
To diagnose tinea versicolor, the physician examines the skin. Most often, the physician bases the diagnosis on the visual symptoms of the condition. The physician may examine a scraping of the skin under the microscope to confirm the presence of yeast in the sample. A special lamp placed about five inches from the skin causes the area affected by the fungus to appear a yellowish green color, according to the American Academy of Dermatology.
Treatment
Treatment for tinea versicolor includes using over-the-counter anti-fungal medications and shampoos. These topical creams or shampoos are spread over the affected area to treat the infection. Prescription strength anti-fungal creams and oral medication can help treat infections that do not respond to over-the-counter medications, according to the Mayo Clinic. After treating the infection, it may recur. Taking oral medications a couple times a month during hot and humid conditions may help decrease the likelihood of a recurrence.
Prevention
Preventing a tinea versicolor infection includes avoiding the use of oily products and avoiding wearing restrictive clothing. Staying out of the sun and keeping cool in hot weather also help prevent the overgrowth of the fungus.
