Scientists have been exploring the genetic make-up of redheads to see if they can find a link between genetics and the way redheads experience pain. Research has shown several generalizations to be true regarding the way redheads experience pain in ways different from the norm.
Redheads are more sensitive to cold compared to their blonde and brunette friends. They are more likely to have sclerosis and endometriosis. They also tend to get toothaches at a higher rate.
It's not all bad, redheads do not experience all kinds of pain with more sensitivity: they tend to feel stinging pain less than anyone else. They're also more resistant to certain under the skin anesthetics. Scientist say that they may have a specific gene to redheads that explain these differences