A member asked:

Hi! could you tell me the difference between the symptoms of pityriasis rosea and parapsoriasis? how common is each rash and the prognosis? thanks!

A doctor has provided 1 answer
Dr. Corey Clay answered

Specializes in Allergy and Immunology

Similar appearance: The palisading variant of small-plaque parapsoriasis is particularly similar to pityriasis rosea. Several salmon-colored patches with a fine scale at the edge can occur scattered over the trunk and extremities. Large plaque parapsoriasis has larger arching appearance and is more distinct. Pityriasis rosea is more common, benign and limited to 10-20 days vs months for parapsoriasis. See derm.

Answered 5/19/2015

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