Infection is a common cause of fever, but other conditions can also bring the heat. Fever means a body temperature of ° F (38°C) or higher. An infection, such as the flu, is the most common cause of fever.
Fever in Adults - Learn about the causes, symptoms, diagnosis & treatment from the MSD Manuals - Medical Consumer Version.
When does a fever in adults require medical attention? WebMD tells you what symptoms to look for and how to bring down a temperature.
When you're riding the waves of chills, followed immediately by an increase in body temperature, it can be exhausting. For most adults, this is a familiar roller.
A fever is usually a normal response of your immune system to a virus or bacterial infection. Most healthy adults can tolerate a fever well.