Pain Across Cultures

Pain varies across populations, but the difference lives mostly in how the brain interprets signals, not in different low-level wiring. Brain imaging suggests the core nociceptive response to a painful stimulus is remarkably similar from group to group. What shifts is the appraisal layered on top — attention, expectation, learned meaning, stress, and experiences like discrimination — and that higher-level processing can make the same stimulus feel more or less intense.

Genes shape sensitivity too. Studies have found that redheads need roughly 20 percent more anesthesia than people with other hair colors, because the MC1R gene behind red pigment also influences how the body handles pain. Hair color can hint at pain sensitivity, though it is not something anesthesiologists routinely dose by.