Hi there Loose Rivets, thanks for your reply. Though experiance of meeting Migrain sufferers, cluster headaches have some similarities but are quite a different animal. I get bouts of attacks, 1 a day in the evening for about 2 weeks, once a year, usually between november and december. There is no loss of vision but one eye becomes inflamed and teary. The headaches are intensley painful and last for about one and a half to two hours.
The best treatments I have found are breathing pure oxygen with a mask and cylinder or a sumatriptan nasel spray. Both are highly effective in about 10 mins. Sleep patterns don't affect the problem, only alcohol and the time of year seem to be the trigger. Any more thoughts?