When you think about body temperature, you might instantly picture 98.6°F (37°C) as the standard “normal” temperature. However, this isn’t quite the rule anymore. Recent research suggests that average body temperatures are slightly lower than what we’ve believed for more than a century.

What Is Normal Body Temperature?

Typically, a normal body temperature is around 98.6°F, but this can vary from person to person. For some, a normal temperature can range between 97°F to 99°F. Factors like the time of day and your level of activity can influence your body temperature, making it a bit of a moving target.

How Has the “Normal” Changed?

Interestingly, studies have shown that the average body temperature has been slowly dropping over the past few decades. Experts suggest this could be due to improvements in healthcare, lower rates of infections, and better overall health, which reduce the body’s need to fight disease, possibly leading to a lower baseline temperature.

When Should You Worry About a Fever?

Now, a fever is when your body temperature rises above what’s typical for you. So, if you’re usually around 97°F and you find your temperature at 99°F or higher, you might indeed have a fever. Doctors say that a fever can be a sign your body is fighting an infection, and it’s a common symptom of illnesses like the flu or a cold.

What Causes Fevers?

Fevers can stem from various causes. These include infections, heat exhaustion, some chronic conditions, and even certain medications. Since the body uses fever as a defense mechanism, it’s often accompanied by other symptoms such as sweating, chills, and dehydration.

When to See a Doctor

You should consider seeing a doctor if your fever is 102°F or higher, persists for more than a few days, or is accompanied by worrying symptoms like a rash, difficulty breathing, or severe headache. In fact, for infants and toddlers, a fever is more urgent and should be checked by a doctor sooner.

How to Measure Your Body Temperature

To get an accurate read on your body temperature, use a digital thermometer. Place it under your tongue, in your armpit, or, for young children, in the rectum to get the most accurate measurement. It’s best to take your temperature at the same time each day, preferably in the morning, as body temperature can fluctuate throughout the day.

Managing a Mild Fever at Home

If you have a mild fever, it’s typically OK to manage it at home. Staying hydrated, resting, and using over-the-counter fever reducers can help you feel better. Just make sure you follow the directions on any medications and keep an eye on your symptoms.

The Takeaway

The classic 98.6°F standard for normal body temperature isn’t a one-size-fits-all number. Today, doctors acknowledge that there’s a range of normal temperatures, and what’s most important is knowing your own body’s usual temperature. So, keep an eye on how you feel and your temperature readings, particularly if you suspect a fever, and consult a healthcare provider if things seem out of the ordinary.