# 37 degrees is no longer normal? What is causing human body temperature to drop all the time?

Due to the impact of the epidemic, temperature testing is now required to enter and exit all major establishments in the country. The thermometer gun can instantly detect your body temperature, generally speaking, less than or equal to 37 degrees can pass. But did you know that a body temperature of 37 degrees you are likely to have a fever.

# The body temperature of the human body is continuing to drop.

If you have observed the body temperature, you will see that most healthy people have a body temperature of 36.5° or less. A doctor in Germany, started the tradition of recording body temperature. He had collected the body temperature of 25,000 humans for observation and found that the normal temperature of human body temperature is 37 degrees. Since then, this standard has been used by the world for a hundred years.

People usually judge a person with a temperature above 37.5 degrees as having a fever. Many children today tell their parents that they don't want to go to school if their temperature is only 37.1 degrees, and many parents will think that they are just making an excuse and are not really sick. But in reality, since the human body temperature is always dropping, if a person's usual temperature is only 36.5 degrees, then at 37.1 degrees they are probably in the real fever stage.

With the increasing frequency of temperature taking today, many people will find that sometimes their temperature is only between 35 and 36 degrees, and many will think that there is something wrong with the thermometer, but there isn't.

Stanford University in the United States has conducted experimental observations on human body temperature. They collected the body temperatures of about 80,000 soldiers during World War II. The final results showed results that the average body temperature of both men and women was decreasing, but the decrease was greater in men. The final conclusion was that every 10 years, human body temperature drops by about 0.03 degrees. Today the normal body temperature for Americans is only 36.6 degrees, well below 37 degrees.

# Why does a person's body temperature drop

Why has human body temperature trended downward over the centuries? This is mainly because the human body is changing, and this change comes from the constant renewal of lifestyle.

Hundreds of years ago, human food was not particularly clean, and medical care was not advanced enough to make us susceptible to disease. 37° body temperature prevents the invasion of germs, which is equivalent to a defense mechanism of the human body. With the continuous development of society. Human food is getting healthier and healthier, the level of technology has also continued to improve, many vaccines can effectively defend against viruses, resulting in less human exposure to some bacteria, the incidence of some diseases from the mouth is greatly reduced.

2. Too much pressure

Although people stand at the top of the food chain, being human is a difficult thing to do. Society is very simple, the complexity is human. Interpersonal rivalry, as well as the economic pressure to bear, mental stress are from time to time plagued by human beings. People under high pressure will secrete a hormone - cortisol to maintain physiological functions. But this hormone also stores fat while maintaining stability. If stress leads to excessive secretion, the metabolic capacity becomes poor and the body temperature becomes low.

3. Global warming

Once upon a time, human beings did not have enough to eat or to wear. Body thermoregulatory mechanisms were also becoming more sophisticated. A higher body temperature is also a way to prevent cold. Nowadays, because of global warming caused by bad human activities, many northern regions in China think that the winter in recent years is not as cold as the winter more than a decade ago. And there is heating and air conditioning in winter, and hot water is readily available from drinking fountains. This makes the human body temperature system let down its guard, the body heat is no longer so active, and the body temperature is not so high.

In order to verify the above conjecture, scientists deliberately find the wild people who do not have a modern lifestyle to argue. Found that their body temperature is indeed higher than modern humans, and in sickness, the body metabolism is also faster, consuming more energy, body temperature is rising. Nowadays humans use antibiotics and other drugs to heal at the beginning of inflammation and illness, directly curbing the fever in the cradle.

# Trouble with falling body temperature

In short, this is the result of mankind relying too much on modern tools. Low body temperature will cause humans to become less active, just like people in winter always do not love to go out as much as in summer, less activity, the body's metabolic capacity will also be reduced. The metabolic rate can not keep up, that means you are more likely to become fat and absorb more than people with the same amount of food.

Low body temperature can lead to decreased immunity

Body temperature and metabolism are also positively related. Bats have a strong immune system because they are able to reach a body temperature of about 40 degrees. Body temperature and immunity are positively related, and when body temperature drops by one degree, human immunity also drops. This shows that the immunity of bats is much higher than that of humans, which is one of the reasons why some viruses are able to survive in their bodies but not in humans.

There are over 60 trillion cells in our body and our blood has to provide enough nutrients to these cells every day and also take away some waste products. White blood cell's can recognize waste and enemies and react accordingly. When the body's body temperature is too high and the blood circulation becomes faster, the white blood cells are able to kill the virus quickly. Similarly, when the body temperature is low and the metabolism is slow, the white blood cells start to be lazy and become much less sensitive to the enemy, and even if the target enemy appears, it is difficult for it to gather other lazy white blood cells for a collective attack.

Of course white blood cells can detect not only common viruses, but importantly, cancer cells in the body. It is important to know that even a healthy person will have five thousand newborn cancer cells in his body every day. As long as there is one leak, that will cause great harm to the human body, and one will give birth to two, two will give birth to four, and four will give birth to everything, which will eventually lead to the creation of cancer. If the body temperature of human beings drops by one full degree, that will cause 1,500 cancer cells to be missed every day. This shows that a lower body temperature is really not a good thing.

The official fever temperature is 37.5 degrees or higher, and the drop in body temperature has led to a change in the body's criteria for being sick, and the criteria that once applied no longer apply. Diagnosis of the condition through body temperature alone is inaccurate, and currently doctors can only judge the condition by the patient's own statement.

Some people may wonder why the temperature standard is not changed. Because everyone's constitution is different, many people's ability to prevent cold is still at a relatively strong stage, and the 37-degree body temperature mechanism is still applicable to such people, so the specific standard should be reduced to how much, and currently can not be determined.

But even though human body temperature is dropping, there is no need to worry too much about health issues. Because on a macro level, body temperature is not dropping at an extremely fast rate. Many strong athletes tend to have a lower body temperature when they exercise, which is normal. Low body temperature, low metabolism can also lead to cellular synthesis of protein slower, so that people slow down aging Oh! In short, usually strengthen exercise, healthy diet, regular life, improve their immunity is the most important.