A fever is usually accompanied by sickness behavior, which consists of lethargy, depression, loss of appetite, sleepiness, hyperalgesia, dehydration, and the inability to … See more

A range for normal temperatures has been found. Central temperatures, such as rectal temperatures, are more accurate than peripheral … See more

Fever is a common symptom of many medical conditions:
• Infectious disease, e.g., COVID-19, dengue, Ebola, gastroenteritis, HIV, influenza See more

Hypothalamus
Temperature is regulated in the hypothalamus. The trigger of a fever, called a pyrogen, results in the release of prostaglandin E2 (PGE2). … See more

Various patterns of measured patient temperatures have been observed, some of which may be indicative of a particular medical diagnosis:
• Continuous fever, where temperature remains above normal and does not fluctuate more than … See more

Immune function
Fever is thought to contribute to host defense, as the reproduction of pathogens with strict temperature requirements can be hindered, and the rates of some important immunological reactions are increased by … See more

Fever does not necessarily need to be treated, and most people with a fever recover without specific medical attention. Although it is unpleasant, fever rarely rises to a dangerous level … See more