injuries poisoning
Heat Exhaustion
Symptoms and Signs of Heat Exhaustion
Symptoms of heat exhaustion are often vague, and patients may not realize that heat is the cause. Symptoms may include malaise, weakness, dizziness, headache, nausea, and sometimes vomiting. Syncope due to standing for long periods in the heat (heat syncope) may occur. On examination, patients appear tired, are usually sweaty and tachycardic, and may have orthostatic hypotension. Mental status is intact, unlike in heatstroke. Temperature is usually normal and, when elevated, usually does not exceed 40° C. 