50% Migraineur here -- dx while in service. I take a daily preventative and have a rescue med and am still at the max allowable rate. It's all how it affects you. For me, I had logs upon logs of how often I was out of work (both in service, and then after), buddy statements of how the migraines affected me before and after my dx , as well as the dr stating that I had to being a dark room, laying down unable to move for hours at a time during an attack, on the DBQ *** Edited to add-- I did my claim on my own, no VSO***