Pityriasis rosea

Pityriasis rosea is a clinical diagnosis and investigations are only used in the context of diagnostic uncertainty - Hannah Thomas

Pityriasis rosea
Pityriasis rosea

image by: Medical Images

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I was diagnosed with pityriasis rosea

At the end of February... for approximately 3 weeks, I presented with itchy red scaly plaques on my abdomen and it was diagnosed as pityriasis rosea. This was characterised by red oval-shaped spots and the presence of a larger very distinctive “herald lesion” that appeared about a week previous to the smaller spots. This is an unmistakable sequence of eruptions that leave no doubt during diagnosis.

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 I was diagnosed with pityriasis rosea

The exact etiology of this skin disorder is unknown, but it is believed to be connected to some kind of infection, most likely viral. It is speculated that the herald lesion is the probable site of an insect bite. Other cases have been reported where lesions have erupted along areas of past trauma and scars, suggesting an isomorphic (Koebner’s) response.

StatPearls

Pityriasis rosea, also known as pityriasis circinata, roseola annulata, and herpes tonsurans maculosus is an acute self-limiting papulosquamous disorder. It is often characterized by an initial herald patch, followed by scaly oval patches within 2 weeks.

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