In this book, the authors present topical research in the study of the causes, treatment and prevention of headaches. Topics discussed in this compilation include the role of melatonin in headache disorders; the mechanisms and treatment options for cluster headaches; temperament patterns and vulnerability to anxiety and depression in children with migraines; the neurovascular theory and pathophysiology of migraines; headaches associated with intracranial aneurysms; blood pressure and allodynic migraine and personality characteristics in men suffering from chronic tension-type and cervicogenic headaches.