I suffer from occasional migraines, which I can stop if i catch them early enough (though sometimes I wake with one and there is not much I can do)
To stop the symptoms developing and to lessen the syptoms when I already have one, I eat some chopped raw cabbage (contains the same active ingredient as aspirin, I believe) and chew a piece of crystalised ginger root. This lessens both the headache and the sick feeling. I don't swallow the ginger, just chew it and swallow the 'juice', then spit it out. Because for some reason it gives me hiccups!!