Pityriasis rosea (PR) is an acute inflammatory skin disorder characterized by erythematous scaling papules and macules. PR lesions are most commonly distributed over the trunk and proximal ...

Important: Make sure to let your care team know if you could be ... that may be causing the rash. Pityriasis rosea is a relatively mild skin rash with a distinct, tree-like appearance.

Diagnosing pityriasis rosea is nearly always made by history and physical examination alone. In certain atypical cases, a skin biopsy may prove useful in differentiating pityriasis rosea from ...