Baby Fever

Fever in babies or children under 5 years of age is defined as an oral temperature above 99.5°F (37.5°C), a rectal temperature above 100.4°F (38°C) or an axillary temperature (under the arm) of above 99°F (37.2°C). During the day, it is normal for the temperature to fluctuate in children. It is usually lower in the morning and rises as the day progresses. It can also vary according to the child''s activity.