Recent Blog Articles
Pouring from an empty cup? Three ways to refill emotionally
Is pregnancy safe for everyone?
New pediatric guidelines on obesity in children and teens
Screening tests may save lives — so when is it time to stop?
Natural disasters strike everywhere: Ways to help protect your health
The case of the bad placebo
Do we feel pain more at night?
If you use cannabis, do it safely
Time for a diabetes tune-up
What are the chances that prostate cancer will return after surgery?
What Is It?
Pityriasis rosea is a harmless skin disease that causes scaly patches that sometimes itch over the torso, neck, arms and legs. Anyone can get it, but it is most common in people ages 10 to 35.
Typically, the disease begins with the appearance of a single large, pink, scaly, oval patch, called the "herald patch." This patch is approximately 1 inch to 2 inches long. It tends to have a salmon-colored center surrounded by a darker pink ring, which some people mistake as a sign of ringworm.
To continue reading this article, you must log in.
Subscribe to Harvard Health Online for immediate access to health news and information from Harvard Medical School.
- Research health conditions
- Check your symptoms
- Prepare for a doctor's visit or test
- Find the best treatments and procedures for you
- Explore options for better nutrition and exercise
I'd like to receive access to Harvard Health Online for only $4.99 a month.Sign Me Up
Already a member? Login ».
As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review or update on all articles.
No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.
Free Healthbeat Signup
Get the latest in health news delivered to your inbox!