ETA: It has been modified to note where "headache" turns into "migraine."
ReedRover's Pain Scale for Headaches
Hrm. I have a headache. I wonder how long I've had that? I should get some tea. Have I taken my allergy meds lately?
Yeah, I definitely have a headache. I hope it doesn't get any worse. Tea refill! Where's my Tylenol?
Darn I've got a headache. Tea and painkillers are required immediately and at regular intervals.
Wow. Tea, painkillers, and Sudafed by the handful might make a dent in this. If not, I'll take a hot shower.
Ok, This is really, really hurting. It's hot shower time.
ETA: It's Migraine Time
The hot shower didn't do it. Gimmie my heating pad and find me a soft flat spot for a while.
I just wanna die, or at least pass out. Leave my heating pad on high and go away. Everything will be all better if I can just get to sleep. Sleep will cure all.
I would cheerfully beat a co-worker to death to make this pain half of what it is now. Really. I'll take that stain on my soul if you can guarantee that I feel better. Not even well, but better.
DEATH TO EVERYONE!... if I could only manage to move.
I would cry except that I know crying would make it worse. There is no reality except for pain. I will embrace my pain and crush it to death under the slow smothering of my heating pad as I smolder in the misery of my nest of fuzzy flannel sheets in the heated water bed in the absolutely silent dark room...
And a quick footnote: This post is mostly for humor, and is not a search for either sympathy or solutions.
And yes, I live with headaches so constantly that 1) their existence sometimes is noticed after the fact and 2) I've used the phrase "would cheerfully beat a co-worker to death" while having never actually done even though I've hit the 10 on this scale a number of times.