Very limited research has examined the relationship between pityriasis rosea and anemia ... in diameter may appear on your chest, thigh, arm, or neck. This is called a herald patch.

Medically reviewed by Katlein Franca, MD An inner-thigh rash may be caused by a variety of factors, including friction, chafing, an allergic reaction, a disease, and a health condition. Its appearance ...

OBJECTIVES: To delineate the natural history of pityriasis rosea in black children and to compare our findings with those of the American, European, and African literature on pityriasis rosea.