![]() ![]() This happens through the release of chemicals when the immune system is activated, usually by a bacterial or viral infection. ![]() What causes fever?įever results from the ‘thermostat’ in the brain being reset at a higher temperature than normal. If you have a fever your cheeks may appear red and your forehead is very warm to touch. Symptoms associated with a fever include feeling abnormally hot or cold, shivering or shaking (called rigors or chills), sweating and feeling tired and generally unwell. the rectal or tympanic (ear) temperature is higher than 38☌.the oral (mouth) temperature is higher than 37.5☌ or.the axillary (armpit) temperature is higher than 37☌.A fever is generally accepted to be present in children if: The method by which the temperature is measured can also affect the reading. A high-grade fever is present when the oral temperature is above 38.5☌. Temperatures between 37.5☌ and 38.5☌ may indicate a low-grade fever. Most centres define fever as body temperature higher than 38☌. The normal body temperature is between about 36 and 37☌, but this can vary from person to person and from hour to hour. What is a fever?Ī fever occurs when the body temperature rises above normal. While many of the causes of fevers are simple virus infections that are not serious, medical advice should always be sought if your (or your child’s) temperature is persistently raised. Having a raised temperature (fever) is a common event and is usually a sign of infection, but fevers can be caused by other illnesses as well. ![]()
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