the worst is when you get them so bad, you just want to scream, but all that comes out is a muffled whisper. And you have nose bleeds for hours at a time.
You try to sleep but you can't. And you try to consintrate on something else like work/ or some other pain- yet it just makes you want to do nothing.
And then you feel sick.

I hate those times.

What works for me is putting something cold on my face or near the temples.

But that's only sometimes- depends on how bad it is.