Currently, about one in six of us get chronic headaches: that's 50 million Americans, six million Canadians, or a staggering 200 million Chinese. In the United Kingdom, about 9 million get migraines; on any one day, 200,000 will have one, with about half missing work or school. And that figure is rising. Why are headaches an increasing problem? Why do particular drugs work for some and not others? What role do genetics, the environment, and diet play in causing headaches? And what could you try if you've done everything for relief and got nowhere? In this book, doctor and former headache sufferer Carole Hungerford addresses what we know about treating and preventing this common health problem. Hungerford explains the science, the possible causes, and methods of prevention.