Prickly heat is caused by blockage of sweat pores. Which option lists the correct condition in the ordering used here?

• A. Heat edema
• B. Heat cramps
• C. Heat rash
• D. Heat syncope

Answer: (C)

Prickly heat happens when sweat pores are blocked, trapping sweat beneath the skin. That irritation and trapped moisture produce a localized rash with a prickling sensation—the heat rash (miliaria) you see in hot, humid conditions. The other heat-related problems involve different mechanisms: heat edema is fluid swelling from prolonged heat exposure, heat cramps come from electrolyte loss and muscle cramps, and heat syncope is fainting from blood pressure drops during heat. So the presentation described by prickly heat aligns with heat rash, the skin eruption caused by blocked sweat ducts.