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What Is Heatstroke?

Heatstroke is a medical emergency caused by your body temperature going too high.

If you don't cool down quickly enough, heatstroke can damage your organs, such as your brain, heart, and lungs. It could also lead to death.

Heatstroke can affect anyone. Those at increased risk include older people who are shut in a hot room without air conditioning even if the room doesn't seem very hot; someone locked in a hot car, particularly children who are too young to open the door (cars are known to heat up very quickly inside, especially in the sun); and athletes and people working in high heat.

If you are getting sick from the heat, you may not realize that your body temperature is too high.

You may have these warning signs of heatstroke:

  • Weakness, dizziness, or light-headedness

  • Headache

  • Feeling sick to your stomach

  • Throwing up

If your skin is hot, flushed, or dry and you are showing signs of confusion, these are indicators of heat stroke. You may or may not be sweaty if you have heatstroke.

Heatstroke is diagnosed based on what happened to you, your symptoms, and your body temperature. Your doctor will do blood and urine tests to see if your organs are working right.

To prevent heatstroke when it's hot outside, it's important to wear lightweight clothes that aren't too tight, stay out of the sun as much as you can, drink plenty of fluids even if you don't feel thirsty, and avoid heavy exercise in the hottest part of the day.

Ask your doctor if any of your health problems or medicines may raise your risk of heatstroke.

Check on older people, especially those who don't have air conditioning, and never leave a young child in a parked car.

If you know you're going to have to work or exercise in the heat, get your body used to the heat gradually. Being physically fit is different than being used to the heat.

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Cataract
Which one of the following descriptions of adverse eye conditions best describes cataract?
  1. A condition in which light rays entering the eye are not focused on the retina, causing blurred vision. 
  2. Progressive optic nerve damage that leads to progressive loss of vision usually occurs because of increased pressure in the eye.
  3. A clouding (opacity) of the lens of the eye that causes a progressive, painless loss of vision
  4. A condition that causes progressive damage to the macula, the central and most vital area of the retina, resulting in gradual loss of central vision.

Disclaimer

Important: The authors, reviewers, and editors of this material have made extensive efforts to ensure that treatments, drugs, and discussions about medical practice are accurate and conform to the standards accepted at the time of publication. However, constant changes in information resulting from continuing research and clinical experience, reasonable differences in opinions among authorities, unique aspects of individual clinical situations, and the possibility of human error in preparing such an extensive text mean that other sources of medical information may differ from the information on this site. The information on this site is not intended to be professional advice and is not intended to replace personal consultation with a qualified physician, pharmacist, or other health care professional. The reader should not disregard medical advice or delay seeking it because of something found on this site.
DID YOU KNOW...
DID YOU KNOW...

Domestic Violence

  • Domestic violence can happen to anyone.

  • An abusing intimate partner may try to control the victim by limiting the victim's access to money and to other people, even by telephone or e-mail.

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