migraine
"I had migraines years ago and they were debilitating.  I had to be alone in a dark room.  I had trouble remembering my own name.  It was as if I had had a stoke.  Eventually I seem to have outgrown them.

I suspect some people label bad headaches, "migraines," when they aren't.  My wife has CFS and has serious, real, migraines about once a week.  Imitrex is nothing short of a miracle medication for her.  Nothing else helps.  

The main negative is the cost - about $250 for a box of about six nasal sprayers.  She will use four to defeat one headache.  Insurance only pays for two boxes a month, and she needs at least three.  With co-pays, we end up spending about $300 a month on Imitrex. "