Sometimes when I wake up in the early morning, I have a headache - not bad enough to actually wake me up though. I usually put it down to either being dehydrated, or sleeping with my neck muscles strained, or not enough oxygen - particularly if I'm snuggled down in the blankets on a cold night.

Anyway, I go to the loo, take a couple of paracetamols, drink a glass or two of water, and change my position in bed. I can usually feel the headache slightly improving even as I drift off back to sleep. If it has happened fairly late, I only need another hour or less to get over it and wake up refreshed.

I don't think it's migraine, and if I had to guess which one of those things it is, my money would be on the bad position in bed. The headache is usually worst if I have inadvertantly finished up on my back (I like to sleep on my side - right side is my favourite). On the occasions I've woken up with a headache when it was too late to go back to sleep, the headache has gone within half an hour or so of my getting up and having some breakfast, with or without the paracetamol.