Fever is a relatively common symptom when a child has chickenpox, but it is not necessary for a person with chickenpox to have a fever. Some people with chickenpox may also have a fever, but it is not detected because the temperature is not taken at the time of the fever. Although the fever is present, the temperature does not rise to 38.5°C or even lower, and may go down after a period of time. The absence of fever when a child has chickenpox can be seen in both cases. Fever is a systemic symptom, if the fever is heavy or does not go down easily with antipyretics, it means that the disease is serious. If there is no fever when chicken pox is present, or if no fever is found, it means that the disease is mild and will most likely be cured after a period of time. This is a good sign and there is no need to worry.