people born without pain receptor how long they live and why

people born without pain receptor how long they live and why they die early in age?

Solution

pain is a survival mechanism of fundamental importance. People born without the ability to feel pain (yes, they really exist) don’t live very long. Your nervous system takes its job of creating pain very seriously, and therefore you can expect that when it thinks a part of the body is being damaged, it will err on the side of giving you a clear incentive to do something about it.
When a body part is damaged, nerve endings are triggered and send warning signals to the brain. But no pain is felt until the brain interprets this information and decides that pain would be helpful in some way - for example to encourage protective behaviors to minimize further damage and allow time for healing. The brain considers a huge amount of factors in making this decision and no two brains will decide the same thing. Many different parts of the brain help process the pain response, including areas that govern emotions, past memories, and future intentions. Therefore, pain is not an accurate measurement of the amount of tissue damage in an area, it is a signal encouraging action. When a professional musician hurts his hand, his brain might consider very different actions than a soccer player with the same injury. And therefore you can believe that he may get a very different pain response.
CNS is constantly adjusting the level of volume on the pain signals depending on a variety of factors.