of PR in the United States has been estimated to be 0.13% in men and 0.14% in women. It most commonly occurs between the ages of 10 and 35. It is more common in spring. PR is not viewed as contagious, though there have been reports of small epidemics in fraternity houses and military bases, schools and gyms. See also Pityriasis circinata - a localized form of pityriasis rosea that affects the axillae and groin Pityriasis - for list of similarly named flaky skin conditions List of cutaneous conditions References External links American Academy of Dermatology - Pityriasis Rosea American Osteopathic College of Dermatology Ailments of unknown cause Papulosquamous hyperkeratotic cutaneous conditions Wikipedia medicine articles ready to translate