Cluster headache has odd features that point to the Biologic Clock--they come at the same time of day and season.  Watch this video to learn about it.Please stay on Podbean and listen to my other podcasts to learn about migraine.This is a podcast by Britt Talley Daniel MD, member of the American Academy of Neurology,  migraine textbook author, podcaster, and blogger.Check out my books on Migraine on Amazon.Follow my webpage at www.doctormigraine.com.Titles: Migraine-400 page textbook, and Volume 1 of the Mini Neurology Series, Migraine-40 page book.  Both books are offered as print or eBooks.All the best.Follow me at:  www.doctormigraine.com, Pinterest, Amazon books, Podbean, and YouTube.Britt Talley Daniel MD