Fever

Fever, also referred to as pyrexia, is defined as having a temperature above the normal range due to an increase in the body's temperature set point.There is not a single agreed-upon upper limit for normal temperature with sources using values between 37.2 and 38.3 °C (99.0 and 100.9 °F) in human.The increase in set point triggers increased muscle contractiom and causes a feeling of cold.This results in greater heat production and efforts to conserve heat. When the set point temperature returns to normal, a person feels hot, becomes flished, and may begin to sweet.Rarely a fever may trigger a with this being more common in young children.Fevers do not typically go higher than 41 to 42 °C (105.8 to 107.6 °F).