CNN Chief Medical Correspondent Dr. Sanjay Gupta's new book examines the world of pain — why we feel it, and how we can treat it. He says distraction and meditation can be useful tools for managing pain. He spoke with Terry Gross about how the brain gets pain signals wrong, alternatives to painkillers, and how a family of circus performers inspired a new drug. Gupta's book is It Doesn't Have to Hurt.



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