A member asked:

Can pityriasis rosea only have herald patch with 2 small dots on other parts of body?all non itchy.how to tell difference of psoriasis n pityriasis r?

A doctor has provided 1 answer
Dr. Glynis Ablon answered

Specializes in Dermatology

Typically PR has: more spots and more diffuse presentation over torso and upper arms and legs. But anything is possible. It is very different than psoriasis vulgaris which has large plaques with silvery scales on top, PR has small macules (flat) that have oval shape with minimal scale. Guttate psoriasis can more mimic PR however distribution is different and lesions round not oval. A dermatologist will know the dif

Answered 7/16/2014

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