Causes and Risk Factors
A fungus called Malassezia, which is a natural component of your normal skin flora is responsible for causing tinea versicolor. The fungus is most commonly found in oily areas of your skin including the scalp, face, and back. Malassezia is not harmful under normal circumstances. But an overgrowth of the fungus can cause this fungal infection.1
The following factors can increase your risk of experiencing this fungal infection:14
A weakened immune system
Steroid therapy
Excessive sweating
Family history of the infection
Pregnancy
Living in a hot and humid climate
Having oily skin
Experiencing hormonal changes
Tinea versicolor tends to be more common among children and adolescents since they experience an increase in sebum (oil) production due to hormonal changes as they get older. This creates a more lipid-rich environment that supports the growth of the fungus.5
Diagnosis
Healthcare providers can diagnose tinea versicolor based on the appearance of the discolored patches on your body. But your provider may also order additional testing to rule out other skin conditions and confirm the diagnosis of the infection. These tests include:62
