Cutting your fingers would hurt you...
Cutting your legs would have hurt you even more...
Infact, cutting any part of the body will definitely hurt you
But,
Have you ever wonder why it does not hurt when you have a haircut?
It is still a part of your body...But it doesn't hurt
Why?

Almost your whole body is covered with hair, some of it is noticeable others is barely visible to the naked eye. Hair grows around 5 million follicles, about 100,000 are in the scalp. As the hair emerges from within a follicle, it is already dead and no shampoo or any treatment would revive it.

Scalp hairs grows about 12 to 15 cm in a year. The hair keeps growing and growing, even it is dead because the older dead hair cells are pushed out by the new hair growth. That is the reason why cutting the dead hair would not hurt but pulling the hair from the roots would make you cry.

Note : Everytime you comb your hair, you may remove about 100 hairs. This is very common and is no case to worry unless it gets excessive.