Discovered my ignorance of a common condition yesterday. Was talking to a friend on the phone.

Me: Dude, I got this bad headache. I'm just lying in bed here. The bright lights are killing me.

Muds: Yeah that happens to me too when I get a migraine.

Me: Er, you know I've always been curious. How's a migraine different from a normal headache? How come some people have them and others like me don't?

Muds: Well for one thing it's on one side of your head and it's more intense.

Me: Yeah, mine's like that. Throbbing actually.

Muds: That happens with a migraine too.

Me: How about sensitivity to light?

Muds: Er, hello? Looks like you've got a migraine...

Me: WTF? That's a migraine? I've had one of these once every few months and I thought they're just really bad-ass headaches!

Muds: They're migraines.

Me: Oh noez! I have migraines!