What are early signs of heat illness to recognize on the field?

• A. Heat cramps, lightheadedness, dizziness, nausea, heavy sweating, fatigue
• B. Rash with itching
• C. Chills, dry skin
• D. No symptoms

Answer: (A)

Early signs of heat illness on the field come from the body's response to overheating and fluid loss. The most important indicators are muscle cramps, lightheadedness, dizziness, nausea, heavy sweating, and fatigue. Muscle cramps show electrolyte imbalance from sweating; lightheadedness and dizziness reflect reduced blood flow to the brain as the body diverts blood to the skin and working muscles; nausea is a common GI response to heat stress; heavy sweating signals the body's active cooling; and fatigue is a general signal of systemic strain. Recognizing these signs early allows immediate action to prevent progression to more serious conditions, such as heat exhaustion or heat stroke, by stopping activity, moving to shade, and rehydrating with fluids that include electrolytes.

Rash with itching isn’t a typical early sign of heat illness; it suggests a skin irritation or allergic reaction. Chills and dry skin aren’t the hallmark early indicators of overheating either and may point to other issues or later-stage problems. No symptoms would mean missing the warning signs entirely.