Normal human body temperature

The temperature inside the human body is referred to as constant body temperature. The purpose of maintaining a constant body temperature is to ensure the normal metabolism and life activities. The main conditions are the products of metabolism, such as oxygen, and the energy released by the human body within a normal range. At the same time, in daily life, when the body temperature rises under physiological conditions, the gas maintains a relative constancy by reducing heat production and increasing heat dissipation.

The body temperature is relatively constant but not fixed. It is something that changes with age, employment, movement and emotions. This variation is often within range. Therefore, the main way to measure human body temperature in daily life is at 8 o'clock in the morning.

There are differences in body temperature between morning and evening, in different parts of the human body, and between men and women. The normal body temperature of the human body has a relatively stable range, but it is not constant. The normal oral temperature (also known as oral temperature) is 36.2℃~37.2℃, the axillary temperature is 0.2℃~0.5℃ lower than the oral temperature, and the rectal temperature (also known as anal temperature) is 0.2℃~0.6℃ higher than the oral temperature. During the day, body temperature is lowest between 2 and 5 in the morning and highest between 5 and 7 in the afternoon, but the temperature difference within a day should be less than 0.8℃. In addition, women's body temperature is generally about 0.35℃ higher than men's. Women's body temperature also changes slightly during menstruation.

When in a healthy state, such as with a normal diet and appropriate clothing, the human body's temperature is generally relatively constant, maintaining at around 37°C (roughly between 36.2°C and 37.2°C), and does not change due to changes in the external ambient temperature. The average normal human body temperature is between 36 and 37 degrees Celsius (axillary). Exceeding this range is fever, below 38 degrees Celsius is low fever, and above 39 degrees Celsius is high fever. Temperatures above 40℃ can be life-threatening at any time.

The method to measure normal human body temperature is to measure the temperature once at around 8 am, 3 pm, and 8 pm, and measure it for several days in a row. The most stable value is the normal body temperature.

When measuring body temperature, you should first shake the mercury column on the thermometer to below 35°C, and then wipe and disinfect it with a cotton swab dipped in alcohol. Nowadays, most people test the temperature by holding the thermometer under the armpit. For young or unconscious children, the rectal temperature can be measured.

The above is the normal human body temperature. The normal human body temperature is generally between 36 and 37 degrees on average. Exceeding this range is a fever. Below 38 degrees is a fever, and above 39 degrees is a high fever. Above 40 degrees is a high fever, which is life-threatening at any time. Therefore, measuring body temperature is of key significance for some vital signs and the prevention and treatment of some other types of diseases.