Merck Manual

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Pityriasis Rosea (Herald Patch)
Pityriasis Rosea (Herald Patch)
Pityriasis Rosea (Herald Patch)

Initially, most people who have pityriasis rosea develop one large scaly patch called the herald patch (arrow), and, within 1 to 2 weeks, smaller tan- or rose-colored patches can occur on the trunk, arms, and legs.

Image courtesy of the Public Health Image Library of the Centers for Disease Control and Prevention.

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Pityriasis Rosea