The body temperature will be relatively high around 5-8 pm in a day, because the body temperature of a day is caused by the sympathetic innervation of nerves, as well as endocrine hormone regulation. Usually normal human body temperature, day and night can have some fluctuations, but the fluctuation range should be within 1 ℃, early morning awake, fasting, resting state of the body temperature is the basal body temperature, that is, the basal metabolic rate, the body temperature at this time is the lowest, but after a day of activity, work, and eating, the vegetative nervous system has been in a state of excitement, the corticosteroid hormone has been a large number of releases in the body, to the afternoon around 5 o’clock, the body temperature is often the highest, so the body temperature in the afternoon is slightly higher than in the morning, but the endocrine hormone regulation. Body temperature tends to be the highest, so body temperature is slightly higher in the afternoon than in the morning, but not more than 1℃.