Pityriasis Rosea - American Family Physician - What causes pityriasis rosea in adults
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Pityriasis rosea is a rash that usually begins as a large circular or oval spot on your chest, abdomen or back. Pityriasis rosea can cause itching. Pityriasis rosea typically begins with a large, slightly raised, scaly patch — called the herald patch — on your back, chest or. Pityriasis rosea most often affects children and young adults. Researchers believe that pityriasis rosea is caused by an infectious pathogen, but they have.