Fever

A fever is when your body temperature is higher than normal, usually above 100.4°F (38°C). It’s a common sign that your body is fighting off an infection or illness, like a cold or the flu.

Fever can make you feel warm or hot, and you might also experience chills, sweating, headache, or body aches. While a fever itself is not an illness, it usually indicates that something is going on in your body that needs attention. Most fevers go away on their own, but if it’s very high or lasts a long time, it’s a good idea to see a doctor.