I posted a similar question on here some time ago. I don't know that it is necessarily a symptom directly related to AS, but I use to have horrible headaches. They almost always occured when my neck and shoulders were very inflamed. Personally, I feel that my headaches are directly correlated with flares. Since going on the no starch diet, my headaches have gone away. The only time they have returned is when I have "cheated" on the diet and caused a flare.
Also, as I'm sure you are aware, just because someone has the B27 antigen present in their system does not mean they have AS. That is a "marker" indicating a high succeptibility to the disease. Your cousin's RA should be able to determine weather she has AS or not though.
I feel for you all though. I had thought that my headaches were migranes as well. They would often be so bad that I would become sick to my stomach and on several occasions did have the vomiting along with the headaches as well. In order to make them go away, I would usually take the strongest pain reliever I could find, then lay on my bed in a dark, quiet room. After a period of time the headached would sometimes go away...but sometimes it might continue for a couple of days. I still do not know for sure if it is directly related to AS, but at least in my mind, I associate it with the disease.
Best of luck to you guys!
Tommy
