Tinea versicolor is a common fungal infection of the skin. The fungus interferes with the normal pigmentation of the skin, resulting in small, discolored patches. These patches may be lighter or darker in color than the surrounding skin and most commonly affect the trunk and shoulders.
It occurs most frequently in teens and young adults. Sun exposure may make it more apparent. Tinea versicolor, which is also called pityriasis versicolor, is not painful or contagious.
After successful treatment, skin color may remain uneven for several weeks or months. It often recurs, especially in warm, humid weather.
Causes
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:
- Hot, humid weather
- Oily skin
- Hormonal changes
- Weakened immune system
Symptoms
- Patches of skin discoloration, usually on the back, chest, neck and upper arms, which may appear lighter or darker than usual
- Mild itching
- Scaling
When to see a doctor
See your doctor if:
- Your skin doesn’t improve with self-care measures
- The fungal infection returns
- The patches cover large areas of your body