Pityriasis Rosea
Definition
Pityriasis rosea is a mild skin disorder common among children and young adults, manifesting initially as a single round spot on the body and followed later by a rash of colored spots on the body and upper arms.
Demographics
Pityriasis rosea is most common in young adults and appears up to 50 percent more often in women. The condition occurs most often in spring and fall and can occur in epidemics within dormitories, army barracks, or other locations where young people live in close proximity to each other.
Causes and symptoms
It is unclear whether pityriasis rosea is contagious. Although some experts suspect the rash may be triggered by a virus, no infectious agent had, as of 2004, been found. Some...
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