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Is a fever of 101 bad: High & Low Grade Fever and How to Reduce a Fever

by alexxlab

Fever & Temperature In Adults: When To Worry

Karen Justiniano, DO, MS, Stamford Health Medical Group

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A friend of mine whose father is 70 years old told me her story. It went something like this:

“My father never gets fevers. Out of nowhere the other day, he developed a 103 temperature with no other symptoms. He is also fully vaccinated against COVID-19. My mother brought him to the emergency room. Did she do the right thing, or would he likely have been fine if he stayed home and let the fever run its course?”

As a physician who cares for a variety of people with a variety of conditions, I have to say of course she did the right thing! When in doubt or when concerned, seeking medical attention is the smart thing to do.

But the longer answer is a little more complicated than that. It all starts with breaking down the purpose of a fever, and when you should truly worry. Please note—fevers in infants or young children are sometimes a different story—what you are about to read relates to adults only.

What is a fever and why do we get them, and sometimes with no other symptoms?

Fever is an elevated body temperature which means your temperature is 100.4 degree F or higher. A fever is the body’s way of fighting an infection by naturally raising your body’s temperature to “kill the germ.” The medical community likes to say that fever is a “good thing,” in most cases.

And yes, it’s completely possible for adults to develop a fever with no other symptoms, and for doctors to never truly find the cause. Viral Infections can commonly cause fevers, and such infections include COVID-19, cold or the flu, airway infection like bronchitis, or the classic stomach bug.

That’s why you often hear the word “viral” as an explanation because these types of infections often go away on their own after a few days.

What is considered a high fever in adults?

A high-grade fever in adults is 103 degrees F or higher.

Is it possible that a fever could be a sign of a “breakthrough case” of COVID-19 even if the person is fully vaccinated?

Yes, but not highly likely. Breakthrough cases of COVID-19 in fully vaccinated people have been reported, but symptoms tend to be milder than in non-vaccinated people, including fever.

First, make sure you are taking your temperature the right way. Taking your temperature by mouth is the most accurate method, and wait at least 30 minutes after you eat or drink anything hot or cold. Get medical attention for your fever if:

  • Your temperature is high and has not gone down after taking Tylenol or Advil
  • Your temperature lasts several days or keeps coming back
  • You live in an area where people have COVID-19
  • You have serious health conditions like diabetes, heart disease, cancer, lupus, or sickle cell anemia. (Non-infections like these can cause fever as well.)

You should also seek medial attention if you have a fever and you:

  • Are pregnant
  • Recently returned from travel overseas
  • Get infections often
  • Are on chemotherapy, in which case you should seek medical attention immediately if the fever lasts for more than one hour.
  • Have recently been bitten by a tick

Is 98.6 still considered “normal” body temperature?

Yes and no. You’ve probably always heard that the average body temperature is 98.6, but the truth is there’s a much wider range—from about 97 to 99 degrees F.

So why is 98.6 suddenly a myth after all these centuries? Research suggests body temperatures are falling overall. Doctors have a few ideas about why this is, including lower metabolic rates, lower rates of infection and more advanced thermometers.

A couple of helpful reminders:

  1. As the saying goes, “Don’t fear the fever.” A fever is your body’s first line of defense in fighting off an infection.
  2. If you are not fully vaccinated against COVID-19, and have developed a high-grade fever, please call your doctor right away.

Fever 101 – A guide to kid’s fevers

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Posted: May 09, 2022

Fever in children can be a scary thing for parents, often causing them to wonder if a trip to the emergency room is necessary. Le Bonheur Pediatrician Ruth Patton MD, of Pediatric Consultants, shares the advice she often gives parents when their child feels feverish.

“Don’t panic,” says Dr. Patton. “Know that fever is the body’s natural reaction to infection.

Dr. Patton offers three important questions to ask yourself when your child has a high temperature:

  1. Is your child’s breathing labored?
  2. Is your child drinking less or experiencing decreased urine output?
  3. Is your child crying inconsolably?

If you answer yes to any of these questions, it’s best to call your pediatrician’s office, no matter your child’s degree of fever.

Dr. Patton stresses that if you have an infant younger than 2 months with a rectal temperature of 100.4 degrees Fahrenheit or higher, you need to call your pediatrician immediately. Fever in newborns does require an exam, as newborns have immature immunity and are more susceptible to serious illness.

Even if your child does not show signs of serious illness, a fever can make him or her uncomfortable. To make your child as comfortable as possible, you can provide temporary relief by administering a dosage of acetaminophen or ibuprofen if he or she is 6 months or older. Most children with a temperature lower than 101 degrees Fahrenheit may not need medication, but if you notice that your child is uncomfortable, it won’t hurt to give them an over-the-counter medicine. You should also keep your child dressed in light clothing, keep the house at a comfortable temperature, offer plenty of fluids and make sure they rest.

Knowing your child’s normal behavior and the symptoms that are accompanying the fever is the most important information for you to consider. As long as you don’t notice any of the three red flags, a trip to the doctor’s office probably isn’t necessary. Just remember to monitor your child closely. If the fever has not reduced after 24 hours on medication, call your child’s pediatrician.

What temperature is a fever?

100.4 degrees Fahrenheit measured rectally, orally, temporally (forehead) or tympanically (ear).

What ‘is’ a fever?

Fever is the body’s natural defense against infection.

When should I call the doctor?

Call your pediatrician if you have an infant younger than 2 months with a rectal temperature of 100.4F or if your child is experiencing any of the following:

  • Labored breathing
  • Inconsolable crying
  • Decreased drinking or urine output

You should also call your doctor if you have a child with a temperature higher than 104 degrees Fahrenheit or temperature does not respond to medication.

What should I do if my child has a temperature of 104 degrees Fahrenheit but is acting normally?

If your child is not exhibiting any of the behavioral red flags, give your child a dosage of acetaminophen or ibuprofen if he or she is at least 6 months old. Continue to monitor your child’s behavior and call the doctor if the fever has not gone down after 24 hours with medication.

What type of thermometer and method gives the most accurate temperature reading?

A digital thermometer administered rectally will give you the most accurate temperature.

Authored by:

Ruth Patton, MD

Le Bonheur Pediatrician

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