Question

why we don't feel any pain when we cut our hair and nails​

Answer 1

Answer:

The part of nails and hair that we cut , does not contain nerve endings. So when we cut our hair or nails we can't feel pain because that part can't send pain signals .

Answer 2

Explanation:

Whenever a body tissue containing nerve endings is injured the nerve is stimulated and it sends pain signal to our brain. The part of nails and hair that we cut, does not contain nerve endings. So when we cut/injure nails/hair we can't feel pain because that part can't send pain signals.