There is a condition known as congenital analgesia. Those with the condition are born without the ability to feel pain. This is a permanent condition with no current cure. But why would we even be looking for a cure? These people are born having won the genetic lottery. They will never know what pain feels like, problem solved. Except pain isn't the problem. People with congenital analgesia as infants often chew off large portions of their tongues while teething, they get frequently damage their skin with heat and cold, they have a very high incidence of broken bones. There is no specific research, but I would be willing to bet that there is a much greater rate of degenerative arthritis in those who survive long enough to develop it.
Pain is simple. Pain is a signal sent by the body to the brain where it is interpreted and the brain then causes the body to respond. You place your hand on a burner, the brain senses the pain and reflexively moves your hand to limit the damage to the body. Simple, but it keeps us alive.
I hope you can appreciate that pain is a useful tool that our brilliantly designed bodies use to keep us safe. This concept seems to get lost when we discuss chronic pain. Patients will either ignore the pain or mask it with medications. In either case, this is the same as leaving your hand on the burner. The pain is indicating damage being done to the body, but instead of seeing it this way, pain is perceived to be the problem.
Shift your perspective on pain and it will make you a healthier person. I have been blessed to be adjusted since birth by my parents and have grown up living the chiropractic lifestyle. For 30 years pain has been my best tool for maintaining a healthy body. The second I feel it, I know I have been either neglecting my posture or did something i shouldn't have. Some friends and family have teased me on occasion because of my apparent low pain tolerance. It's not that I don't tolerate pain, I just react more quickly to resolve it.
The problem with pain is that pain isn't the problem. Find out why you are in pain and work to resolve the cause with lifestyle management and chiropractic care, don't shoot the messenger.