These "headaches" started a few months ago - and last for about one week a month. They are characterized by a strange, pinching feeling on top of my head that typically - about 75% of the time - I can't feel at all until I make a facial expression - ie frown, furrow my brow, crunch my face together - then I feel a sharp pinch in the same spot every time, the top slight left of center of my head. It occurs in an area about the size of a quarter. The other 25% of the time I may be able to feel some vague pressure or something in that spot, and the pinching still happens when I move my face. My doctor sent me for a CT, which was normal. I have an apt at a headache clinic, but the next spot wasn't for a month. Anyone have any ideas?