Here’s What’s Happening to Your Body When You Have a Fever
When you heat up, a lot of extraordinary things are happening in your body. This is what a fever means—and when you need to worry.
First: What is a fever?
Anytime your body temperature increases to 100.4 degrees Fahrenheit or higher, you have a fever. "Normal body temperature is 98.6, and some people tend to run a little lower or higher, but anything over 100.4 is considered a fever," says Deborah Nunziato-Ghobashy, DO, family medicine physician at Scarsdale Medical Group. Most of the time it's the body's natural response to an infection.