Many persons run a daily temperature.
The cycle of temperature is different from one person to the next. In the morning the temperature is usually sub-normal (below 98.6° F or 37° C). In the late afternoon there is sometimes a small rise above normal.
This does not necessarily mean the person is ill.
When a person has been sick and is running a "low order fever" in late afternoons he should be up and around and should be down a little while if he feels too tired and then get up again.
Continuous lying in bed because of a "low order temperature" will weaken a person.
Low order temperature means one of a few tenths occurring once a day.
All people have low and then higher temperature cycles. It does not mean that a person is ill. The AMA, since it makes its bucks out of temperatures doesn’t bother to mention this in its medical literature and texts.
Silly Optimist: A person who expects to feel well all the time while running a meat body.