I have had this strange localized (that is, always in the same spot) headache for... few months now. It's a sharp and short (it lasts for maybe 2 seconds at a time) stabbing pain. usually it happened spontaneoulsy, but occasionally I could trigger it by shaking my head. I mentioned it to a nurse few weeks ago, and she said that it's probably a cramp, and she told me to take some magnesium. And sure enough, it seemed to fix the problem. But yesterday the pain came back, even though I have been taking magnesium-supplement daily. It's not as severe as before (at worst, I had the pain several times a day) but still. And it usually happens if I bend down, and get up quickly. Now, I'm not overtly worried about it. I mean, I'm not sensitive to light, nor have I been vomiting (which rules out tumors and the like), and the nurse thought that it's probably nothing major. It could be icepick-migraine. But the strange thing is that it often happens when I get up quickly, which means that it could be related to blood-pressure. Any ideas? Anyone else here with similar issues?