Headache is the pain in the face, head or neck. There are different types of headaches which can be classified as either primary or secondary headaches based on their symptoms and severity. Primary headaches are generally tension headaches or migraines. Secondary headaches are caused by underlying infections, brain bleed, tumors, head injury or vascular disorders. Severe headaches can sometimes cause depression. Migraine is a type of primary headache that causes moderate to severe headaches. The headaches that occur in migraine are of pulsating nature and affect half of the head. The causes of migraine include environmental and genetic factors. This book unravels the recent studies associated with migraine and headache. It is a valuable compilation of topics, ranging from the basic to the most complex aspects of this area of study. This book is a resource guide for experts as well as students.