Signs and Symptoms
Hot, dry skin is typical. as blood vessels dilate in an attempt to increase heat dissipation, sometimes leading to swollen lips. An inability to cool the body through perspiration causes the skin to feel dry.
Other signs and symptoms vary. Accompanying dehydration can produce nausea, vomiting, headaches, and low blood pressure and the latter can lead to fainting or dizziness, especially if the person stands suddenly.
In severe heat stroke, there may be confused, hostile, or seemingly intoxicated behavior. Heart rate and respiration rate will increase (tachycardia and tachypnea) as blood pressure drops and the heart attempts to maintain adequate circulation. The decrease in blood pressure can then cause blood vessels to contract, resulting in a pale or bluish skin color in advanced cases. Young children, especially, may have seizures. Eventually, organ failure, unconsciousness and death will result.
Read more about this topic: Hyperthermia
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