Roseola usually causes a high fever that lasts about three to five days. The fever can reach temperatures as high as 103 to 105 degrees. Just as the fever breaks, a rash usually forms on the trunk.

For example, roseola starts on the torso and spreads out, and measles begins on the face and spreads down. These rashes may occur with a fever or cold symptoms, after a fever breaks, or independently.

An exanthem is any eruptive skin rash that may be associated with fever ... Measles, rubella, erythema infectiousum and roseola infantum are part of the six classic childhood exanthems, and ...