I had sudden onset headaches from coughing, sneezing, bending and any other movement that causes strain. I ve had 2 CTs, and a MRI. They didn t show any problem with the brain or sinuses. I have read about a primary cough headache, but my doctors apparently don t go along with that. The headaches are lasting longer. At first it was like an explosion across the forehead, easing up in a couple of minutes; now they ease some, but I may keep a middle intensity headache for hours. They are almost unbearable when I first cough, etc. How can I get relief from the pain?