Sarah Anne Shockley is the author of The Pain Companion. In the Fall 2007, she contracted Thoracic Outlet Syndrome, which is a collapse of the area between the clavicles and first ribs, and has lived with debilitating nerve pain ever since. She has been a regular columnist for the Pain News Network and is a regular contributor to The Mighty, a 1.5 million–member online community for those living with chronic illness and pain. Visit her online at www.ThePainCompanion.com. Printed with permission from New World Library — www.newworldlibrary.com.