Can Yoga Cure Headaches / Migrains ?

Being classified as totally intolerant of NSAIDs painkillers for even a simple headache or fever, eg no Paracetamol, Brufen, Ibubrufen, Ponstan and some antibiotics unless I am prepared to look like an alien without nosebridge with eyelids so swollen and streched out the little eyes could hardly open, as an allergic reaction to these drugs. Then, have to take anti-histamine to drain out the excess fluids causing the swell. That would take about 24 - 36 hours to subside. It is totally no fun at all.
So it became my lifetime mission to search for a cure - if possible a natural therapy without further risk of developing another drug allergy to counter my migrain.
Hence, that was one of my reasons for turning to yoga. But it wasn't quite yoga that provided the cure. I found my cure quite by accident. It was one of those yoga sessions where the guru was emphasizing on practicing more meditation regularly. So, during one of my home practice session, despite an emerging migrain coming on slow, I thought I would just sit quietly and concentrate on my breathing. In about 30 minutes, to my astonishment the migrain disappeared ! Just Zap, gone, can't feel anything. But the joy was shortlived as an hour later, it returned and got worse due to exposure to sunlight, change of temperature. That night, still with a lingering migrain, I did my meditation for 30 minutes and voila, again my migrain disappeared.
Had a good night sleep and woke up to a wonderful morning the next day. In retrospect, I believe it was qigong breathing that I experienced that cured my migrain. I could feel the sensation, kind of bloated feeling in the head that completely wiped out the pain. Though this does not prevent the migrain from coming back, at least every time I feel an onset coming, I would sit for 30 minutes to keep it in control. And it works, without drugs !! Happily.