View pictures of pityriasis rosea in the gallery below. Pityriasis rosea is a self-limiting rash, resolving in about 6–10 weeks. The "herald patch" is a primary feature, usually found on the chest, abdomen, or back. Pityriasis Rosea. A 20-year-old student presents to the school’s health clinic complaining of a scaly rash on his trunk. He recalls having a mild fever and headaches a few weeks prior, but did not think much of it. The lesions do not itch. He loves to play tennis and spends a lot of time outdoors and wear proper attire during activities. It is slightly more common in women than men. How does pityriasis rosea usually manifest? In 50 to 90 percent of cases, the eruption begins with a "herald" or "mother" patch, a single round or oval, sharply delimited, pink or salmon-colored lesion on the chest, neck, or back. The herald patch is usually 2 to 5 cm in diameter. .

how common is pityriasis rosea