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When you are a child, you learn that a square has four sides. When you get a little older, you learn that there are 50 states and that pi is about 3.14. And at some point when you try to sprinkle the school's nurse to send you home, you learn that thetemperature of a healthy human body is 98.6 degrees Fahrenheit (or 37 degrees Celsius). But it turns out that the only medical fact that you know is true is true isA bad tree fluentlyAccording to doctors, most people have taken from the tome of all their lives.

Especially since the general public has been more serious to keep an eye on the symptoms of coronavirus, some may be aware that even when you are healthy, the thermometer does not always read 98.6 - and it is not Not because of a thermometer that is on the fritz. "Anecdotage, I would say there are many people who may not be aware thatNormal temperature is a beach, not a fixed number, "Donald FordMD, a family medicine physician at the Cleveland Clinic in Ohio, told CNN.

So, how can you be sure you get a precise reading? Read ahead to see what really makes the mercury rises and more signs of the virus, you need to know, discoverThis strange pain could be the first sign you have COVID, the study says.

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Few people realize that the widely accepted temperature we hold to be a healthy figure has been established in the middle of the 19th century byCarl Wunderlich, a German doctor who analyzed a million temperature readings extracted from the armpits of more than 1,000 patients toMedium temperature, which was 98.6 degrees. But while being able to recite the figure could make you feel as if you took a page of a medical school manual, more modern research showed that there was no magic number that applies to all people. In fact, some studies have found thatThe average temperatures decreased overall.

For example, a 1992 study published in theAMERICAN MEDICAL ASSOCIATION JOURNAL (Jama) Who examined the body temperature of 148 patients aged 18 to 40 years determined that "[98.6 degrees] should beAbandoned as a relevant concept for clinical thermometry. "Instead, the study suggested that temperatures of 98.9 degrees early in the morning and 99.9 in the afternoon should be considered the upper limits of healthy patients under 40 years. And for more information on the key signs you could have caught Covid, checkIf you have this symptom, there are 80% chance you have COVID.

Usually, to reach a thermometer in the morning means that you can already feel that you run a little hot than usual. But disease control and prevention centers (CDC) define a fever as having "aMeasured temperature of 100.4 degrees Fahrenheit [38 degrees Celsius] or greater or feel warm to the touch, or gives a story of feverish feeling, "which even means that the digital threshold is open to some interpretation. And for more information on signs to become aware, checkThe most common covidant symptoms, according to those who had.

These are not just viruses that can result in fluctuations in your temperature, either. As anyone spent time working on hot weather or freezing, there are many different variables that can affect the readings on the thermometer you are using. In addition to extreme ambient temperatures, have something hot or cold food or drink can affect readings up to 40 minutes, CNN reports. On the other hand, the support of counter-drugs such as ibuprofen or acetaminophen could hide any fever that you would otherwise live.

To say if you are really sick, the best method can sometimes be sleeping on it. "If there is nothing else that happens, he will usually go and return the normal during the night"Waleed Javaid, MD, the Director of Infection Prevention and Control at Mount Sinai Downtown in New York explained at CNN. "Fever with the fluctuation of body temperature is a totally different thing. ... usually, you do not feel any difference between your higher temperature time and your low temperature weather." And for more health guidance and COVID updates delivered directly to your inbox,Sign up for our daily newsletter.

Infrared front thermometers may have become popular as pump control tools during the pandemic, but medical experts say thatThere are ways to be more precise in your measurements. "The thermometers of the skin or ears are easy to use, but may be less accurate than oral or rectal thermometers," said Ford CNN. "The armpit (also called axillary) [is] Somewhere between. The difference is that the fever is defined as an elevation of the central body temperature, and the skin and the ear membranes can be more subject to external temperatures or exercises and may not reflect the central temperature. "

Nevertheless, there is nothing wrong with the old way. "You can always do the oral temperature or put the thermometer in the mouth," says Javaid. "It usually gives you a very good idea." And for more ways to test if you may be sick at home, know thatIf you can not feel these 2 things, you can have Covid.