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Your hairs have nerves attached to the roots inside your skin.
Adrenaline stimulates tiny muscles to pull the roots of our hairs, thereby making them stand up on our skin.
it means that ur cold and ur skin is trying to make u warmer
well how did you get caterpillar hairs in you in the first place... and how can you see them
yes...................................
It is due to the over-activation of some Hormone.This Hormore is only for Men but sometimes it activated in women so hairs comes on their skin.
it can cause cancer and early aging also can cause skin to feel leathery and to wrinkle. If you stand long enough under the sun you will have sunburn on your skin. But if you stand for even more longer you may get skin cancer which was caused by the Ultraviolet from the Sun.
fuz
probably ingrown hairs. If the hairs are cut short (below the skin) they can grow under the skin and become infected.
You have hairs all over your body that hold the water on your skin.
Some hairs do stand up from fear. An example is the 'hackles' that stand the hair erect on the back of dogs and other animals when they are ready to fight. When the skin tightens during an adrenalin rush, the hair appears to stand up at the roots, but this is hardly noticeable with the soft hair of most humans.
You get goose bumps on your skin. Each one of your hairs has a very small muscle (arrector pili) attached to it.When this muscle contracts, it causes the hair to stand upwards pushing some of the skin into a tiny hill. What you will see is a goose bump. You don't notice that the hairs are also up. But the same thing occurs in other animals and they appear larger.