Tinea Versicolor (Pityriasis Versicolor)
The Medical Dermatology Program at Massachusetts General Hospital is a full-service dermatology practice that provides care for all skin, hair and nail conditions.
Tinea Versicolor (Pityriasis Versicolor)
What is tinea versicolor?
Tinea versicolor (pityriasis versicolor) is a fungal or yeast skin rash. It’s caused by too much growth of a certain yeast on the skin. It causes patches on the skin that are lighter or darker than your normal skin color. The patches most often occur on the chest or back. They also stop the skin from tanning evenly and often appear as lighter spots on tan skin. After treatment, it might take several months for your skin color to return to normal. Every person has this yeast on their body. So this rash is not contagious to others. It can’t be spread if someone touches it. So you don’t have to worry about exposing others at work or school.
What causes tinea versicolor?
Yeast is a type of fungus that normally lives on the skin. This condition occurs when the yeast grows too much. It grows more easily in hot climates, and on oily or sweaty skin. Researchers don’t know why some people get this rash and others don’t. It's not spread from person to person.
Who is at risk for tinea versicolor?
You are more at risk for tinea versicolor if you:
Live in a hot, humid climate
Have moist or oily skin
Have a weak immune system
What are the symptoms of tinea versicolor?
Symptoms can occur a bit differently in each person. The most common symptom is patches on the skin that may look white, pink, or light brown. The patches may also look dry or scaly. The rash is often on the neck, upper back, chest, and shoulders. The patches are most easily seen in the summer because they don’t darken in the sun. You may have mild itching, especially if you get hot. The patches can grow in heat or humidity, or if you are on steroid therapy or have a weak immune system.
The symptoms of tinea versicolor can look like other health conditions. See your healthcare provider for a diagnosis.
How is tinea versicolor diagnosed?
Your healthcare provider will ask about your symptoms and health history. They will give you a physical exam. The physical exam will include looking closely at your skin. They may use an ultraviolet light called a Wood's lamp to see the patches more clearly.
You may also have a skin scraping. The healthcare provider scrapes the top of your skin with a small tool. The scraped tissue is examined with a microscope to look for the yeast.
How is tinea versicolor treated?
The rash is treated with antifungal or medicated dandruff shampoo on the skin. Use the shampoo over your whole body in the shower. Let the shampoo stay on for a few minutes before rinsing it off. Don’t use soap afterward. Do this every day for 4 weeks.
Your healthcare provider may also prescribe antifungal cream or oral antifungal medicine to take by mouth. They may advise you to use miconazole or clotrimazole cream without a prescription. Use this 2 times a day for 7 days.
Your skin may only get better for a short time. Then the rash may happen again. You may need to use the shampoo each month to keep the rash from coming back. It may take several months for your skin to return to its normal color.
Talk with your healthcare providers about the risks, benefits, and possible side effects of all medicines.
What can I do to prevent tinea versicolor?
This fungus can come back again after treatment. If you have recurrences, you may need to use shampoos or medicines. To help prevent the rash from returning, use medicated dandruff shampoo over your whole body when in the shower. Do this once a month for the next year. This is very important to do in the summertime. That is when the rash is most likely to come back.
Also make sure to:
Not use skin products that are oily.
Stay out of hot, humid weather.
Stay away from things that cause a lot of sweating.
Wear loose clothing to let your skin stay cool and dry.
When should I call my healthcare provider?
Call your healthcare provider if you have:
Symptoms that don’t get better, or get worse
Fever of 100.4°F (38°C) or higher, or as directed by your provider
Key points about tinea versicolor
Tinea versicolor is a fungal skin rash. It’s caused by too much growth of a normal yeast on the skin.
The most common symptom is patches on the skin that may look white, pink, or light brown. They may also look dry or scaly.
The rash is usually on the neck, upper back, chest, and shoulders. It is not spread from person to person.
The rash is treated with antifungal or medicated dandruff shampoo on the skin.
Your skin may only get better for a short time. Then the rash may happen again. You may need to use the shampoo each month to keep the rash from coming back.
It may take several months for your skin to return to its normal color.
Tips to help you get the most from a visit to your healthcare provider:
Know the reason for your visit and what you want to happen.
Before your visit, write down questions you want answered.
Bring someone with you to help you ask questions and remember what your provider tells you.
At the visit, write down the name of a new diagnosis, and any new medicines, treatments, or tests. Also write down any new directions your provider gives you.
Know why a new medicine or treatment is prescribed, and how it will help you. Also know what the side effects are.
Ask if your condition can be treated in other ways.
Know why a test or procedure is recommended and what the results could mean.
Know what to expect if you do not take the medicine or have the test or procedure.
If you have a follow-up appointment, write down the date, time, and purpose for that visit.
Know how you can contact your healthcare provider if you have questions.
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