Roseola infantum, also known as baby rose rash, is an acute contagious disease in children caused by viral infection. The characteristics of the disease include a sudden onset, with an initial fever lasting 3 to 5 days, followed by a rash after the fever subsides, usually resolving on its own. Roseola infantum is a self-limiting disease with a duration of about one week. Treatment does not shorten the recovery time but can help alleviate uncomfortable symptoms. Treatment measures include: 1. Rest and hydration – Encourage the child to rest and drink plenty of fluids. If the child is very uncomfortable or refuses to drink, hospital treatment may be necessary. 2. Fever management – If the child is very uncomfortable due to high fever, fever-reducing medication can be taken under a doctor's guidance, according to the child's weight.