Why is it that there is the rashes on my skin after the high fever?

Fever and Rash: The occurrence of rashes is a common phenomenon. However, the harshness of a fever and a rash is not relative to the severity of an illness. Mainly, the cause of rash is usually a viral illness. The virus present in the body gets transferred through the respiratory tract, and becomes the main cause for rash after the fever has subsided.