Roseola infantum is a common febrile exanthematous skin disease in infants and toddlers, primarily caused by viral infection. Its clinical presentation includes a sudden onset of high fever without obvious triggers in the child, with temperatures reaching up to 40 degrees Celsius. After 3-5 days of fever, the temperature suddenly drops, generally returning to normal within 24 hours. As the temperature decreases or after the fever subsides, a rash starts appearing. During the illness, the child often also experiences swelling of the lymph nodes behind the ears and neck, along with mild irritability, discomfort, and diarrhea. If vomiting occurs, it might indicate additional discomfort such as a gastrointestinal type of flu, potentially accompanied by symptoms like diarrhea and vomiting. If the child exhibits significant vomiting, along with other symptoms such as decreased urine output or diarrhea, it is advised to take the child to the hospital promptly for medical consultation and timely intervention treatment by a doctor.