An inflammatory skin disease with unclear aetiology, although an infectious cause has been suggested.
Can present in patients of any age but most often in people aged 10 to 35 years.
Manifests as an acute, self-limiting, inflammatory eruption characterised by a single larger lesion, the herald patch, followed by eruption of smaller papulosquamous oval lesions.
Spontaneous resolution, usually over several weeks, but can persist for up to 5 months.
Symptoms treated by topical corticosteroids and/or oral antihistamines, or UV therapy.
Pityriasis rosea (PR) is an inflammatory skin condition of uncertain aetiology, although an unknown infectious agent has been suggested. PR manifests as an acute, self-limiting, inflammatory eruption characterised by a single larger lesion, the herald patch, followed by eruption of smaller papulosquamous oval lesions.
History and exam
Daniela Kroshinsky, MD, MPH
Director of Inpatient Dermatology
Associate Professor of Dermatology
Massachusetts General Hospital
Harvard School of Medicine
DK declares that she has no competing interests.
Eve Lowenstein, MD
Chief of Dermatology
EL declares that she has no competing interests.
Ladan Shahabi, MD
University of Michigan
LS declares that he has no competing interests.
John English, MBBS, FRCP
Department of Dermatology
Queen's Medical Centre
Nottingham University Hospitals NHS Trust
JE declares that he has no competing interests.
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