I think I might go with the ex theory.

FYI...I have no clue why but for the last 2 weeks my head has been sore. I never have had what I would consider the classic headache from my accident but my head gets very sore where it was hit (like overdoing weights first time Back in the gym after a few months off). As usual I have no idea what set it off or why it hangs around, but it is definitely here.

Maybe nothing set you off, I know I can be hard pressed to explain flair ups sometimes.

Bud