Article topic: Hypnic Headache Authors: Wendy Saliba and Ali Hijazi Editors: Odette El Ghawi, Joseph Akiki Reviewer: Ethar Hazaimeh  Keywords: Hypnic headache, hypothalamus, ICDH-3, secondary causes, caffeine.  Abbreviations: Hypnic Headache (HH), International Classification of Headache Disorders, 2nd edition (ICHD-2), International Classification of Headache Disorders,...