Question: is pityriasis rosea a disease?
Answer: Pityriasis rosea is a common skin condition characterized by a scaly rash that sweeps outward like the branches of a pine tree. Pityriasis rosea is a rash that usually begins as a large circular or oval spot on your chest, abdomen or back. Called a herald patch, this spot can be up to 4 inches (10 centimeters) across.