When you go into a hospital in Australia you're assessed by nursing staff using the Visual Analog Scale (VAS), otherwise known as "If Zero is no pain and Ten is the *worst pain imaginable*, what is your score out of ten?".
I used to take into account CH pain, then rate my own pain score for my other ailments (spinal injuries, musculo-skeletal problems) and got nowhere with this approach, as I have arrived in hospital and sat through Kidney stones, gall bladder issues and all sorts with no pain relief, as I was being well... honest and calling a broken vertebrae and crushed nerve a 6 or 7/10 when it was very, very painful.
Fact is, it was not a CH attack.
I took consensus on this a long while ago and generally, it seems most CHers are doing themselves a huge disservice if they take into account their CH pain, when considering any other pain. If I've just had surgery, or broken a bone, torn a ligament or whatever, if it's painful, I don't openly go referring to my CH pain at all and after 25 years of zero pain relief in hospital settings, they finally got out the drugs one needs for the injury or ailment at hand.
One of the troubles here in Australia is the wording that nursing staff in hospitals have to use when applying the VAS (1-10) pain scale.
"Worst pain imaginable". Well, that's why we're here.
We know the worst pain and don't have to imagine it!
If I tell a nurse I have the worst pain imaginable 4-6 times per day, they think I'm "catastrophising" my pain and I'll get no pain relief for other ailments.
Nursing staff asking you to conceptualise pain (imagine it) seems very inept. I've not had a major organ removed nor a major car accident, surely there are others with real references to this kind of "imaginable" pain, who've actually experienced it and don't have to imagine...
As much as I personally dislike the Kip scale (and respect to Bob Kipple where it is due) I think one needs to keep a cluster/Kip scale up the sleeve just for CH and a VAS for every other pain.
Mike is spot on as usual.
Joking with the nursing staff will not help...
From time to time when they ask me that dreaded question... I answer with Pi; π a mathematical constant..
It seems apt for the chronic CHer who has constant interictal pain (shadows and Migraineous component), it never ever stops and goes around in circles = π
I prefer the Nigel Tufnel approach... One of the greatest rhetorical arguments ever mounted over "10" being the upper limit of measurement in what is subjectively felt.
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edit; typos