Infections - Fungal
Pityriasis Versicolor
Tinea versicolor
Common, especially in warm climates
No — it comes from your own skin yeast
Yes, though it often comes back
What Is It?
Pityriasis versicolor is a common, harmless rash caused by an overgrowth of yeast that lives naturally on everyone's skin. It creates small patches that are lighter or darker than surrounding skin, usually on the chest, back, and shoulders, and may be mildly scaly or itchy.
Signs & Symptoms
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Small patches lighter or darker than your normal skin
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Fine, dry scale on the patches
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Most common on the chest, back, shoulders, and neck
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Mild itch, especially when hot or sweaty
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More noticeable after sun exposure (patches don't tan)
Why Does It Happen?
A yeast called Malassezia normally lives on the skin without causing problems. In warm, humid conditions or with oily skin and sweating, it can overgrow and affect the skin's pigment, leaving lighter or darker patches. It is NOT caused by poor hygiene and is not contagious.
Treatment Options
Antifungal treatment clears the yeast overgrowth. Color changes can take weeks to months to fade even after the yeast is gone — this is normal.
ANTIFUNGAL SHAMPOO/WASH
Ketoconazole or selenium sulfide applied to the skin as a wash.
ANTIFUNGAL CREAMS
Applied directly to smaller affected areas.
ORAL ANTIFUNGALS
Short course of pills for widespread or stubborn cases.
MAINTENANCE
Periodic antifungal washes help prevent it from returning.
Tips for Managing It at Home
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Expect skin color to even out slowly over weeks to months
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Use antifungal washes periodically if it tends to recur
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Keep skin cool and dry; shower after sweating
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Wear loose, breathable clothing in hot weather
When to Call Your Provider
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No improvement after a few weeks of treatment
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The rash spreads widely or keeps returning
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Patches become very itchy, red, or inflamed
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You're unsure whether it's this or another skin condition
Sources & further reading
The information in this handout is based on general dermatology guidance from the reputable organizations below. These links are provided for patients who wish to read more from trusted sources.
American Academy of Dermatology (AAD). Tinea Versicolor: Overview. https://www.aad.org/public/diseases/a-z/tinea-versicolor-overview
DermNet. Pityriasis Versicolor. https://dermnetnz.org/topics/pityriasis-versicolor
MSD/Merck Manual. Tinea Versicolor. https://www.msdmanuals.com/professional/dermatologic-disorders/fungal-skin-infections/tinea-versicolor
This handout is for general education and does not replace advice from your own provider. Always follow your provider’s specific instructions.
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