Pityriasis rosea

Pityriasis rosea 

Updated: 02/06/2023

© Jun Wang, MD, PhD

General features
  • Very common, self-limited, possibly viral, benign lesion of children and young adults
  • “Fine pink scale”
  • More common in young patients
  • Associated with upper respiratory tract infections, certain drugs, vaccines
Clinical features
  • Acute eruption 
  • May present with fever, headache, malaise, lymphadenopathy
  • Initially a single large "herald patch”
  • Then a generalized rash 1-2 weeks later, lasting 2-6 weeks, “Christmas tree” pattern on the trunk
Pathological features
Diagnosis
  • Pay attention to history of infection, travel, medication, etc
  • Clinical presentation of Herald Patch, and Christmas tree pattern rash
Differential diagnosis
Management
  • Treat symptoms only

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