f social rupture is not treated as seriously as broken limbs, it is because we cannot see it. But neuroscientists can. A series of fascinating papers suggest that social pain and physical pain are processed by the same neural circuits. This might explain why, in many languages, it is hard to describe the impact of breaking social bonds without the words we use to denote physical pain and injury. In both humans and other social mammals, social contact reduces physical pain. This is why we hug our children when they hurt themselves: affection is a powerful analgesic. Opioids relieve both physical agony and the distress of separation. Perhaps this explains the link between social isolation and drug addiction.