In the second world war, the physician Henry Beecher observed that some of his soldier patients, despite being injured on the battlefield, required no strong painkillers to manage their pain. In some cases, the injury was as severe as losing part of a limb.
A truly remarkable phenomenon had come into play – the effects of fear, stress and emotion on the brain had switched off their pain. But how does this work – and how can we use it to our advantage?
