Which condition is characterized by core temperature above 105°F, CNS dysfunction, hot/flushed skin, minimal sweating?

Which condition is characterized by core temperature above 105°F, CNS dysfunction, hot/flushed skin, minimal sweating?

• A. Exertional Heat Exhaustion
• B. Heat Rash
• C. Heat Cramps
• D. Exertional Heatstroke

Answer: (D)

Exertional heatstroke occurs when heat stress during activity overwhelms the body's cooling mechanisms, causing the core temperature to soar above 105°F and leading to central nervous system dysfunction. The hallmark is a person who feels confused, unsteady, or may have seizures or collapse, with the skin hot and flushed and little or no sweating as thermoregulation fails. This combination—extremely high core temperature plus CNS impairment and minimal sweating—distinguishes it from milder heat illnesses. Heat exhaustion, for example, usually involves dehydration and symptoms like fatigue and dizziness with sweating still present and a lower core temperature. Heat cramps are muscle spasms from electrolyte imbalance, not CNS changes or extreme hyperthermia, and heat rash is simply a skin irritation. Immediate rapid cooling and medical attention are essential for heatstroke.

Exertional heatstroke occurs when heat stress during activity overwhelms the body's cooling mechanisms, causing the core temperature to soar above 105°F and leading to central nervous system dysfunction. The hallmark is a person who feels confused, unsteady, or may have seizures or collapse, with the skin hot and flushed and little or no sweating as thermoregulation fails. This combination—extremely high core temperature plus CNS impairment and minimal sweating—distinguishes it from milder heat illnesses. Heat exhaustion, for example, usually involves dehydration and symptoms like fatigue and dizziness with sweating still present and a lower core temperature. Heat cramps are muscle spasms from electrolyte imbalance, not CNS changes or extreme hyperthermia, and heat rash is simply a skin irritation. Immediate rapid cooling and medical attention are essential for heatstroke.