October+Science+Discover+TE

October 5,2014 Have you ever wondered when you get a hair cut way it doesn't hurt, but when you cut your knee it hurts like crazy? you don't feel any pain when your hair gets cut because hair does not have any nerves so it doesn't hurt. Nerves send waves to the brain when it senses something that hurts. Like temperatures, pain, and textures. If you pull your hair it will hurt because the roots of your hair have nerves and will hurt and may cause a headache.