Illnesses caused by viruses and bacteria invade our bodies and make us sick. Without our immune system to fight off these infections, we could die. Colds, tonsillitis, otitis media, the flu, bronchitis, tetanus, measles, mumps, chicken pox, AIDS, pneumonia are all examples of bacterial and viral infections. Temperature is usually measured in the mouth by a thermometer being held under the tongue for 5 to 8 minutes. Fever is a good thing.
Fever is our body's natural response to fighting germs.
The body basically shivers and has chills when the fever is rising, especially rapidly and sweats when the fever is dropping, or breaking, as some say. Our blood and lymphatic systems produce white blood cells which are what fight off infection. As our white blood cells increase in number, like an army to fight the germs, they go faster and faster attacking the germs, this causes our bodies to heat up, thus causing the fever or rise in body temperature. The hypothalamus in the brain, which is the body's heat regulating mechanism is affected by the pyrogens, or the white blood cells that are produced to fight the infection. So, in effect, we can say that the fever is what is fighting the infection.