Hi All, this is my first post, but I've spent a lot of time on the site reading posts. It's a great community, thanks so much!
So here's my hypothesis: I'm convinced that cluster headaches are caused by extreme muscular tension in the neck. If you eliminate the muscular tension, you eliminate the cluster headaches.
Here's how we can start to test this hypothesis: I would love if each person who reads this checks themselves. My bet is that every one of you has a knotted muscle in the neck that's so tense it feels like a bone. And it's especially bad on the side where you get the headaches.