High temperature and humidity increase the risk of tinea versicolor fungal infection, according to WebMD. In addition, individuals with oily skin, impaired immune systems or taking certain medications are more susceptible to tinea versicolor infection.
Tinea versicolor causes different colored patches to appear on the skin, explains WebMD. Patch color varies by individual skin color and ranges from white, pink, red, tan to brown. An affected individual's patches are usually the same color. Additional symptoms include scaliness of the affected area and possible, although uncommon, itching.
The Malassezia furfur yeast causes tinea versicolor infections, states MedicineNet. The fungus is a normal and noncontagious part of the body's flora. Brown or reddish brown patches recover immediately after treatment.