Chronic pain afflicts over 100 million people across the United States. It diminishes their productivity, their quality of life and costs hundreds of billions of dollars each year to medically manage. It shatters people’s emotional wellbeing, tears apart families and claims lives through suicides and accidental drug overdoses. But now researchers have found promise in a novel, non-pharmacological approach to managing chronic pain — treating it with green light-emitting diodes (LED).