Why Do We get Fevers

Fevers are the body’s way of letting us know that something is wrong. They are also the body’s way of combating viruses and infection. Normal body temperature is around 98.6°F (37°C). If the body has a fever, temperature will steadily rise higher than this.

When infections invade the body’s system, toxins are produced. This usually results in a temperature rise. The response by the body is to activate the immune system. White blood cells combat bacteria by raising the temperature.

White blood cells produce certain substances that raise the temperature, since toxins do not have a very good tolerance to heat. Therefore, fevers help fight these toxins and eliminate them from he body. When we sweat, we are expelling toxins from the body.

Extract from http://www.wisegeek.com/why-do-we-get-fevers.htm