I suffer from migraines. Granted, I am 30 years old, not 11. However, my neurologist says that over 50% of women suffer from at least 1 migraine a month, most starting in their teen years.
My story does not matter - though there could be several contributing factors to my pain, the MRI noted nothing of significance. It did however show many white spots which proved to my dear husband that I was not faking my frequent spells. At 28 years old I was pretty much incapacitated 5 days a week from a sever headache. Unable to do anything that was not absolutely necessary - had gained 40 lbs, and was miserable. So I took my MRI results to a neurologist and he prescribed Topomax in the smallest dose possible. I was supposed to take it for a year, but had some side affects that were less than pleasant, so stopped after 6. The headaches had been reduced to about one a week and I was feeling pretty good. During that time, I found my new best friend - Excedrin. I learned that when I start to see any sign of a headache, to pop an Excedrin. Within 20 minutes, I was fine - better than fine thanks to the caffeine ingredient.
I am not recommending medication right off. For about a year, I was able to mostly control the pain through physcial therapy and deep tissue massage to relax my pectoral, neck, and cranial muscles...but that stopped working. Exercise didn't help, in fact made it worse. I've always eaten quite healthily, so it wasn't that. I don't have any allergies other than dander and saliva, and we don't have any pets, my blood pressure is actually low....medication was my last resort.
I finally accepted that my migraines could not be explained - medication was the only option and it worked.
It's been two years, and Excedrin is still working for me when I need it - 1 or 2 times a week. I've lost 30 lbs, have the energy I need to be a good mom, wife, and friend. Yes, I still get migraines and don't know why.
So my suggestions would be...
Drink a lot of water
Cut out sugar, hydrogenated oils and processed foods
Exercise
Take vitamins religiously
Get 8 hours of true sleep
Meditate or do yoga
and learn to see the early signs of an oncoming headache...no matter how small and treat it immediately, because it will turn into a migraine, she's wired for it...at least that's how my doc explains it.
All the best for your sweet daughter - I hope you can get them under control soon!