I have been hit every day since the onset in 2014, believe it was March. It does not matter. If not cluster or cluster-like, migraine, or paroxysmal. And, my C5-C7 was an ACDF Reconstruction with an implant. The rest of the discs in the neck are beginning to show myopathy (spinal cord compression) and radiculopathy is established.
This means I am well overdue to have the rest of the discs removed, and ACDF. Most likely with implants. Artificial discs are junk money rackets. The best neurosurgeons will bluntly tell you that. A few of the best spinal reconstructionists are in my area (Thank God). Most of my L Spine needs to be finished as well.
Anyway, despite the above, my muscles become stiff as a board before any headache. Like, popping 2 Soma (Carisoprodol) (tried several times) won't phase it tight. So yeah, it appears common. My muscles are abnormal, alarmingly tight because of my movement disorder. When you place that into context and the fact that I notice it, that should tell you something.