Ferrit I don't get cluster headaches, but I suffer from something called
Sluder's Syndrome. I was diagnosed with it last year and oh boy howdy when it hit's me it can last for 2 or 3 days and about the only thing that even marginally helps is to be locked in a dark room with a heating pad over my head. The syndrome is actually related to cluster headaches. Luckily I have only had 1 bad episode in the last 3 months, but I did have a minor episode up here at work Sunday night through Monday morning. :(