Answer:
Roseola is a common infection that usually affects children by age 2. It's caused by a virus that spreads from person to person. It can cause a high fever followed by a rash that doesn't itch or hurt. About a quarter of the people with roseola get a rash.
Roseola, also known as sixth disease, usually isn't serious, and it goes away on its own in a week or so. Treatment of roseola includes cool cloths and medications to reduce fever.