Why is skin so vulnerable to paper?

Ouch! It hurts!

You can be a small lad or a power honcho, but when it comes to paper cuts, your head starts to reel. Why does paper cuts hurt so much?

You never know the wobbly paper could attack you with the ninja blades....

The paper-ninja cut is one of the worst little annoyance, they sure provide a lot of pain.

We use our fingers to sense things in our surroundings. Your fingers are too sensitive and they have many nociceptors compared to other parts of the body.  If you get a paper cut around your elbow or knee, you don't feel much pain compared to your fingertips.

The fingertips have many nerves called nociceptors, and they make the brain to respond to the sensations.

Fingertip is also a main problem and as you keep on moving them, the paper cut widens, making you feel terrible. It gets exposed to environmental conditions such as air, sunlight and other irritants which makes the pain stronger.

The paper is also a mischief maker. Though they have a smooth surface, their edges have some minute irregularities that are as sharp as a knife. When you rub your fingers along the edges, they activate the nociceptors.

A nociceptor is a sensory neuron that responds to damaging or potentially damaging stimuli by sending possible threat signals to the spinal cord and the brain. If the brain thinks the threat is credible, it creates the sensation of pain to direct attention to the body part, so the threat can hopefully be mediated. This process is called nociception.

These nociceptors are pain receptors and have the ability to respond to change in temperature pressure etc. 

These paper cuts are not deep enough to boost the body's defence mechanisms such as blood clotting, so the damaged nerve endings are left exposed.

Well, for the luckiest few, these are just like wiping off the shoulders.