The emphasis of this book falls naturally on the Big Three headache disorders: migraine, tension-type, and cluster headaches. Other topics include medication overuse and misuse, complementary and alternative treatments, headache in special populations such as children and adolescents, and the difficult headache patient. Special features include the headache calendars and diaries, headache impact test, and the MIDAS questionnaire. Recognize the common headache patterns as you learn to perform an efficient screening physical examination in three minutes. Identify and separate primary from secondary headache by utilizing the SNOOP mnemonic useful in recalling key features predictive of dangerous headaches.