37℃ is only an approximate figure of body temperature, and there are differences between different parts of the human body, morning and evening, and between men and women. The oral temperature of normal people is 36.3℃ ~ 37.2℃, the axillary temperature is 0.3℃ ~ 0.6℃ lower than the oral temperature, and the rectal temperature is 0.3℃ ~ 0.5℃ higher than the oral temperature.
The temperature of the human body is relatively constant, but it will fluctuate within 24 hours a day, and generally the difference is not more than 1 degree. The body is slightly lower in the morning and slightly higher in the afternoon. After exercise and eating, the body temperature is slightly higher, and the body temperature of the elderly is lower. The normal temperature of children is between 36.5 and 37.5. The increase of body temperature fluctuates with the changes of gender, age, day and night, exercise and mood, but this change is often within the normal range.
Extended data;
Methods of keeping body temperature normal
1, and the room temperature was maintained at 20℃. The average annual temperature in Bama, Guangxi is about 20℃, and it is also the hometown of longevity praised by the World Health Organization. The best sleeping room temperature is about 20℃. Above 24℃, the sleep becomes shallow, the times of turning over and kicking the quilt increase, and the room temperature drops below 18℃, making it difficult for people to sleep deeply.
2. Take a hot bath. Australian studies have found that bathing in a bathtub with hot water at 35℃~40℃ can promote blood circulation, open pores, relax nerves, help clean skin, enhance metabolism and eliminate fatigue.
3. Always walk at a brisk pace. The "big heat producer" of the human body is muscle, and the muscles of the lower limbs are very rich. Regular walking can exercise lower limb muscles, raise basal body temperature and make the body full of vitality. It is recommended to walk 10,000 steps every day, wear shoes that fit well and clothes with good breathability.
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Reference source; People's Daily Online-The Mystery of Body Temperature: Why is the body temperature 37℃