Fatigue, culminating in collapse, caused by overexposure to heat. There are 3 main causes of heat exhaustion: insufficient water intake, insufficient salt intake, and a deficiency in sweat production. In addition to fatigue, symptoms may include faintness, dizziness, nausea and vomiting, headache, and, when salt loss is heavy, heat cramps. The skin is usually pale and clammy, breathing is fast and shallow, and the pulse is rapid and weak. Unless it is treated, heat exhaustion may develop into heatstroke. Treatment of heat exhaustion involves rest and the replenishment of lost water and salt. Prevention is usually by gradual acclimatization to hot conditions.
Heat exhaustion |
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