I have what seems to be discribed as a "Ice Pick" headaches. I have had these since I was in my late 20's and can last from a few hours to 3-4 days. Recently over the last six-eight months they are coming more frequently; Is there any relief for these? I take 600 mg Ibeprohine about every 6-8 hours but sometimes it doens't work or last. They come on from nowhere, I don't seem to have anything that regularly happens before they start.