Not sure if I should be concerned about this...

Since around late May or early June, whenever I put pressure on one part of my head in a certain way, I feel a kind of dull pain. I put the pressure around the right-end of the center of my head, and I feel the pain in the right side. Nothing about this has changed since it started. It's not serious pain, I haven't been having any actual headaches outside of this, and I don't believe I have any other head-related symptoms. This has just been going on long enough that I'm beginning to worry something's wrong.