Attacks most often last 4 - 8 weeks. Symptoms may disappear by 3 weeks or last as long as 12 weeks.
The rash starts with a single large
The skin rashes:
- Are often pink or pale red
- Are oval in shape
- May be scaly
- May follow lines in the skin or appear in a "Christmas tree" pattern
- May itch
Signs and tests
Your health care provider can usually diagnose pityriasis rosea by the way the rash looks.
Rarely, the following tests are needed:
- A blood test to be sure it is not a form of
syphilis, which can cause a similar rash
skin biopsyto confirm the diagnosis