Pityriasis Rosea

Pityriasis rosea (pit-uh-rahy-uh-sis row-zee-ah) is a common skin disease that causes a rash. This rash usually disappears on its own without treatment. You can expect to see the rash for about 6 to 8 weeks. Sometimes the rash lasts much longer.

This rash can be very itchy.

Some people who develop this rash see a dermatologist to get treatment for the itch.

If this rash appears during pregnancy, a woman should tell her doctor.

Source: American Academy of Dermatology