\u00a9 2020 wikiHow, Inc. All rights reserved. "The only sure way to check for a fever is to use a thermometer. Include your email address to get a message when this question is answered.By using this service, some information may be shared with YouTube.It’s important to note that the most accurate way to check for a fever at home is to take an accurate temperature reading with a thermometer. While water normally boils at 212 °F (100 °C), at high altitudes it will boil at a lower temperature, 194 °F (90 °C), due to a decrease in atmospheric pressure.If the water contains impurities, like salt, the boiling point will change. Carefully read the instructions before using your digital thermometer. Put the tip under your tongue, towards the back of your … You can also use your hand or your elbow to help gauge water temperature. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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