I Have Had My Neck Adjusted (popped) Twice In The

I have had my neck adjusted (popped) twice in the past few months that relieved a steady headache on the left side of my head that runs from my left eye, over my head and down the back left side of my head. The second time a chiropractor (who I went to when I was on an out-of-town trip) took an x-ray, told me the name of the problem/said it was common. I didn't write down the name of the problem, and I'd like to do research on it. Any ideas of the name of it based on my description?