Feeling a little heated? There are some surprising issues that can cause your temperature to rise.

A normal body temp is typically around 98.6 degrees Fahrenheit (37 degrees Celsius) but can vary slightly for each individual, and even fluctuate depending on the time of day.

It can be lower in the morning and higher in the late afternoon and evening, said Michael Hall , a physician based in Miami. But when your temperature gets to 100.4 degrees Fahrenheit or higher, and lasts more than a few hours, youre getting into fever territory something that can be caused by a number of conditions.

Most of my patients understand that a fever is a common symptom of cold and flu, said Christopher Dietz, an area medical director at MedExpress Urgent Care . However, what some people might not realize is that a fever isnt always just a sign that youre coming down with something.

Heres what could also be at play, according to medical experts: