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What we measure by touching something is not an absolute temperature but merely a difference in temperatures and the difference is not noticeable when both hand and head belong to the same, high temperature person.

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15y ago
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12y ago

the touch your forehead to tell fever comes from the premice you don't have fever yourself. If someone's temperature is higher than yours you can conclude he might have a fever but if you touch your own forehead, the temperature would be the same as your hand so you might not be able to tell difference between the two.

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12y ago

When you touch someone else's forehead t test for temperature, what you're really doing is testing for the difference in temperature between your hand and their forehead. When you touch your own forehead, there's very little difference regardless of your temp.

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14y ago

Mostly because your hand temperature is affected by the fever, so your forehead wouldn't feel hot.

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12y ago

Your're hand is most likely the same temperature as your head, as one without a fever will feel you as much warmer than their own hand. Sorry if this answer isn't totally correct.

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Q: Why you cannot establish whether you are running high temperature by touching your own forehead?
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