There’s a long history, going back centuries, of treating some people’s pain and ignoring others. Haider Warraich is a doctor at Brigham and Women’s Hospital, Harvard Medical School and the VA Boston Healthcare System. He joins host Krys Boyd to discuss why there’s more to understanding pain than what’s measurable – and about how power dynamics have always played into its treatment. His book is “The Song of Our Scars: The Untold Story of Pain.”