We all know what hurts, but why is it so difficult to describe? Emma Cook meets the neurologists attempting to solve one of medicine’s most enduring issues and what it means for patients – and hears from a woman who has never felt pain We all know what hurts, but why is it so difficult to describe? Emma Cook meets the neurologists attempting to solve one of medicine’s most enduring issues and what it means for patients – and hears from a woman who has never felt pain