Good evening, I have been experiencing severe headaches today; 3 separate occasions. It seems to begin in my temple area and then radiates throughout the left side of my head. The pain is a sharp, throbbing, pressurized type of pain. The pain makes it difficult to drive, walk, and see. I have no previous history of migraines. I do, however have issues with my sinuses. This pain is something I have never experienced before. Do you have any idea what this could be? Your input is greatly appreciated.