What Heat Can Do to Your Body

Your body pushes sweat out onto the surface of your skin.
It happens in extreme heat when your body cannot get cool enough and sweats away too much water and salt.
This is heat at its most dangerous.
When it is very hot, you can sweat away too much fluid, along with essential minerals like sodium and potassium.
It happens, often in hot humid weather, when you sweat so much that your sweat glands get blocked.
Bare skin burns if it is in the sun too long.
Heat can dehydrate you and make it harder for your brain to get enough blood.
Heat can cause your fingers, toes, or ankles to swell and make your skin feel tight.
When you get hot, your heart may beat faster.
When you are hot, you sweat. That makes you lose fluids and electrolytes.
You may find it harder to concentrate and do hard tasks as things heat up.
You might be fine exercising outside when it is 85 degrees and the humidity is low.
Drink lots of water, even if you are not thirsty.
It can be life-threatening, and heat exhaustion and heatstroke are not the only reasons.

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Reviewed by Sabrina Felson, MD on Thursday, June 07, 2018

First Aid Emergencies: What Heat Can Do to Your Body

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