Here's a breakdown:
* Hair Structure: A hair strand has two main parts:
* Hair Follicle: This is the living part of the hair, located under the skin. It's where hair growth originates. It contains cells that divide and grow to form the hair shaft.
* Hair Shaft: This is the visible part of the hair that extends out from the skin. It's composed of keratin, a protein that's made up of dead cells.
* No Nerves: The hair shaft doesn't contain any nerves. Nerves are what transmit pain signals to your brain. Since there are no nerves in the part of the hair you're cutting, there's no pain.
* Pain and the Follicle: The area around the follicle does contain nerves and that is why plucking or pulling out hair can cause pain, because you are stimulating the nerves around the follicle.