🩺 DR SMUDGE TALKS PYREXIA #smudgeshealthyliving 🩺 Pyrexia is an elevation of body temperature from mechanisms that cause heat production. Fever develops when the brain “resets the thermostat” to an elevated level. In contrast, Hyperthermia is an elevated body temp in which the set point remains normal. Hyperthermia develops from increased muscle activity; increased environmental temperature; or increased metabolic rate. Elevated body temperature is defined as >102.5°F-103.0°F (>39.1-39.4°C) Wi