I have a dull ache on left side of head , above left eye , comes and goes, mostly if I am sitting, standing or bending forward, does not bother me when I am in bed. I have used ice pack, half a Tylenol arthritis, and 1 tylenol arthritis, on different days. It started the day after I got my flu shot. I am unable to take other meds, only tylenol, but with regular headaches it works very well taking only a half, this time it has not. concerned because my father had history of strokes and died of one.