Roseola infantum is an acute febrile developmental disease caused by human herpesvirus type 6, and in some cases, by human herpesvirus type 7. Generally, the fever lasts three to five days, and a rash appears after the fever subsides, typically lasting about two days before fading. If there are no complications, recovery is usually swift. The rash in roseola infantum is roseola-like maculopapular and is neither painful nor itchy. Therefore, this rash does not cause itching. If the rash is significantly itchy, the likelihood of roseola infantum is relatively small, and it may be caused by allergies or other reasons.