Roseola infantum, also known as baby roseola, is a common acute febrile rash skin disease in infants and toddlers. It is characterized by sudden fever in children under three years old that lasts for 3-5 days, followed by a sudden drop in temperature and the appearance of rosy-pink maculopapular rashes. Typically, there is no apparent cause for roseola, with sudden high fevers reaching about 39 to 40 degrees Celsius, lasting for 3-5 days, after which the fever drops suddenly, and then rashes appear as the temperature falls.

In winter, if a child contracts roseola, it is particularly important to pay attention during periods of high fever. Make sure the child does not wear too much clothing. Overdressing or wrapping the child too tightly during a fever can lead to overheating syndrome, which, in severe cases, could be accompanied by damage to other organs. Additionally, if the child sweats during the fever, clothing should be changed promptly to prevent catching cold.

Furthermore, avoid exposing the child to drafts. If the child experiences wind chill during a feverish sweat, it makes them more susceptible to other infections, like upper respiratory infections or potentially pneumonia. Therefore, during winter, when children exhibit high fevers from roseola, close monitoring of their body temperature is essential, as well as avoiding overheating syndrome. Close observation of the child's mental state is crucial if they exhibit high fever. If their mental condition worsens or if they show signs of convulsions, medical attention should be sought immediately.