It may be more a remedy than a cure, but this is what I do for my cluster headaches at night. I have found that if I wrap my head, neck and eye with a small blanket or a knitted scarf when I go to bed I don't get wakened at night with the excruciating pain. I am not saying that I don't get neck or head pain, but it isn't that terrible sharp pain that makes you get up out of bed. I feel sure that the natural heat dilates or relaxes the nerves or muscles. I know that there is no money in this and it has actually been taken off of websites because of that, but it works and that is all that matters to people that are suffering.