Why cant we feel certain small objects when we touch them on one part if the body, but on a completely different part of the body we can?

Question

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

Answer 1

In your finger vs ankle scenario it’s really just because of how thick the skin is. You can’t feel it on your finger because the skin in thicker and usually more callused. Your ankle however is more thin skin since you don’t use them in the same way you do your hands so the nerves are closer to the surface of your skin