Roseola is a viral infection affecting young children. It causes a skin rash of a pinkish color after the child has been racked by high fever for a couple of days. The multiple rash spots tend to turn white when touched. Individual rashes may have lighter rings of pink around them like halos. The spots start out on the trunk of the body, then spread to the neck, face, arms, and legs. It is a fairly common disease in children between 3 months to 4 years of age.