It’s from your neck! If you didn’t know that already. I just had laparoscopic surgery down in Florida on my c5-c7 and even before they I was getting terrible headaches. I actually just requested to have physical therapy to help with my posture and strengthening of my neck

Oh I know where they were coming from. And the shoot to my forehead. Almost like a migraine. I'm fused from C3-C7. But in a way I actually can move my neck. But I read that most cerviogenic headaches are caused by the fusions from C2-C3. I don't have a C2..lol. But I know they can replace the fusion with a replacement. But I also have a lump in the right side of my neck. That I did not have before surgery. And the physical therapist thought it was a tight muscle.