Category: Fevers

The average “normal” body temperature is no longer considered to be a static 98.6°F, with recent studies suggesting a slightly lower average and more individual variation. This makes many people wonder, is 99.9 out of fever, is that normal? The answer depends on several factors, including the individual, the time of day, and the measurement method.

An average adult's body temperature naturally fluctuates slightly throughout the day due to circadian rhythms, but a more significant or persistent rise after a fever breaks can indicate an ongoing issue. This recurring pattern is often a key reason why is my temperature going back up is a concerning question for many.