I started getting headaches in my mid-20s. I threw out my back at work one day and never did anything to fix it—I relied on my standard “ignore it and it’ll go away” strategy. This caused entrenched muscle imbalances, which led to steadily mounting tension along the length of my spine, which eventually came to rest in my neck and shoulders.
I started getting tension headaches at the back of my head, where my spine connects to my skull. These headaches are a dull throb on one side or the other, sometimes nothing much, sometimes bad enough to make me sweaty and nauseous and shaky. I always knew when one was coming on because it would be preceded by a few hours of mounting tension in my back and shoulders. I always knew when one would be really bad because my neck would start cracking every time I moved my head.