I can't answer your question, but I can tell you what happened to me.

I started getting migraines and they were testing me for strokes, found brain lesions, thought ms. I then developed constant headaches.

First neuro said they were *rebound* from taking too many over-the counter meds for the headaches.

I was not taking much of anything for them, so I don't agree with that.

I take a lot more stuff now (Advil), and don't get 24/7 h/a, so that says something.

My Blood pressure was low-normal, my blood work was all good, no allergies. I did find I was light sensitive and weather made it worse, but only the migraines, not the daily h/a, was sensitive to weather or foods.

I had a constant, noticeable h/a for almost 7 yrs. Not to scare you, because it was not horrible and I did get used to it. Still have a bit of a h/a but mostly not that I notice.

Topamax takes care of most of it, and I am down from 2-3 migraines a week to 2-3 migraines a month.

According to migraine info I have read, it is not normal to suffer this disease for this long or this seriously unless some other disease/disorder is involved, and major health org's advise to have your doc keep looking for other causes for it.

People get h/a for a lot of reasons, from stress, allergies, neck injury, infections, etc. When they do not respond as you think they should, you need to find out why they're happening and treat the cause.

I figure it this way - if ms can cause all those other sensations over the body, why not headaches? I think it's totally possible.