Dr. Marie Jhin, a dermatologist in the SF Bay Area, answers your questions about pityriasis rosea.
If you have small pink ovals on your arms, torso, or back, it could be pityriasis rosea, a skin problem that causes a rash.
Although the rash can be alarming, with red bumps and patchy blotches, it is usually nothing to be concerned with. Unfortunately, it is unknown what causes the rash, but some simple at home steps can help manage the rash and make you much more comfortable.
The rash is most commonly seen in people younger than 35 years old, but can affect anyone. No one knows what causes it, but the rash is not contagious or sexually transmitted.
What does the rash look like?
Pityriasis rosea begins as a single pink patch, ranging in size from 2cm-10cm. Within a few weeks, small, pink ovals, sometimes accompanied by red bumps and blisters, appear in patches on the soft skin of the stomach, back, chest, arms, legs and neck. The rash rarely spreads to the face. Pityriasis rosea is also known as the “Christmas Tree Rash” due to the characteristic shape that the rash commonly forms on the back.
How can I manage the rash at home?
The rash doesn’t have many negative side effects. However, about 75% of individuals with pityriasis rosea experience some degree of itching. To treat itching, take an oatmeal bath or use an over the counter anti-itch cream.
If you are looking for a way to get rid of the rash, some suggest getting out in the sun. A few minutes in the sun may speed up the time it takes for the rash to leave your system. But don’t forget to apply sunscreen to your face before going outside!
When should I see a doctor?
Pityriasis rosea should go away on its own within 8 weeks.
If pityriasis rosea lasts for more than three months or if you are pregnant, make an appointment with the doctor. Another reason to see your doctor is if the rash appears on the palms or the bottoms of the feet—this could indicate a more serious skin condition.
If you are concerned about a rash, contact Robert, our Patient Manager, to schedule an appointment. He can be reached at info@premier-dermatology.com or by phone at 415-371-8600 (SF office) or 650-551-9700 (Peninsula office)









