Say a hair, for example, touches your fingertip and you cant feel it. If you bring that same hair to say, your ankle, you can feel a slight tingling.
In: Biology
Certain parts of the body are adapted for more precise feeling. Fingertips are used to feel around, so the skin contains more numerous and sensitive nerve ending adapted to transmit this extra information back to the brain.
Other parts like the back or arms have thicker skin and less sensitive nerves, meaning they are less likely to trigger the fine reactions that you experience as “feeling” a tickling hair.
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