More than 45 million Americans suffer from chronic, recurring headache, yet their symptoms are often dismissed as psychosomatic or "all in their head." The fact is chronic headaches are legitimate health complaints that wreak havoc in sufferers' lives. Industry loses an estimated $50 billion per year to absenteeism, lost productivity, and medical expenses caused by headaches. This guide gives headache sufferers of any age what they need - real, substantive information from a source that is trusted by people all over the world. This book is one of a series written by physicians from the world-renowed Cleveland Clinic, one of the top four medical centers in the United States. It provides a straightforward and clear examination of headaches and serves as a complete home reference for both patients and caregivers. No headache sufferer should be without this book.