Researchers believe the pain sensitivity in redheads may come from a genetic mutation that affects hair color.
One of the study's authors says the findings show a redheads' fear of the dentists tends to be more than just urban legend.
Researchers believe the pain sensitivity in redheads may come from a genetic mutation that affects hair color.
One of the study's authors says the findings show a redheads' fear of the dentists tends to be more than just urban legend.