I've had them off and on for about 5 years and they use to pop up whenever and now it's only once a month. My mom says she thinks they are hormone related. I see a nuerologists evey six months and he at first said I had a pniched nerve in my neck, and that may be the case, but why is it now I only get them at that time of the month. I take Maxalt for mine and they cost me $50.00 for 9 pills, so I take them sparingly. I will get a migraine if I drink too much, so I don't do that very often anymore. Mine aren't like the ones other people talk about, where they can't stand light or noise, none of that bothers me. I get like this knot in the back of my head on the right side, that throbs and sometimes they get a bad enough that they make me sick to my stomach. Not that I'm looking forward to menopase, but if that helps get rid of them then bring it on!!!! Thanks mom for the inheritance!!!!!LOL