What is the bair nerve?

Answer 1

I assume "bair" to be a typo, and that you actually mean "bear nerve". Bear nerve endings are raw and exposed nerve endings. Nerve endings are found in the skin, they are scattered throughout the body. The body's nerve endings pass electrical singles (cool, cold, the pain of freezing, warm, hot, the pain of being burned, itching, stinging, and the pain of being bitten, sharp, being cut or stabbed...), that are optimized for pain detection; these messages are relayed as impulses to the brain. These tiny nerve endings are microscopic in size; they form a single that is passed on to the brain; as they feed the impulse and sensation of length, intensity, location... from the body's peripheral nerves to the brain.