Roseola infantum is a common acute febrile exanthematous disease in pediatrics caused by a viral infection. It is moderately contagious. Its typical characteristic is that the child will have a continuous high fever for 3-4 days, followed by the appearance of a rash after the fever subsides. Once the rash appears post-fever, there is no need for further medication. At this time, the child should be given plenty of fluids, and the diet should be light and easy to digest. Some children may also experience more frequent bowel movements, in which case it is sufficient to take good care of the skin in the affected area and keep a close watch. Throughout the period of the rash after the fever, just ensure adequate hydration without additional medication, let the child rest more, avoid crowded places, and typically, the disease will be fully recovered in about 3 days.