Body, mind and genes all play a role in influencing the perception of pain
PAIN, unfortunately, is a horrible necessity of life. It protects people by alerting them to things that might injure them. But some long-term pain has nothing to do with any obvious injury. One estimate suggests that one in six adults suffer from a “chronic pain” condition.
Steve McMahon, a pain researcher at King’s College, London, says that if skin is damaged, for instance with a hot iron, an area of sensitivity develops around the outside of the burn where although untouched and undamaged by the iron the behaviour of the nerve fibres is disrupted. As a result, heightened sensitivity and abnormal pain sensations occur in the surrounding skin. Chronic pain, he says, may similarly be caused not by damage to the body, but because weak pain signals become amplified. …