When my blood sugar is high, I get a headache.
Especially, in the morning when my fasting level is high, the headache is so severe that my eyes are watering.
Paracetamol helps a little. I prefer the Panadol Extra ones which I dilute in water. They work within 10-15 minutes.
However, when my blood sugar levels are low, and I mean really low, I get migraines.
And I don't just mean a bad headache. I mean migraines with the whole shabang that comes along.
Throbbing pain on one side of the head and the face, the type of pulsing pain...
Sensitivity to light
Nausea and vomiting
Pins and needles sensation on my arms, tongue and face
Vision loss
Speech problems...
... and then, I pass out...
Feels like I am having a stroke...
For these cases, my doctor had prescribed Imigran tablets. They work fast but, they ruin my stomach and I feel like my brain is not functioning properly for 2 days...So, I would not recommend these...
I agree with Robert, make sure you drink lots of water, that usually prevents headaches.
If you work with computers and you stare at the screen for long hours then, try to take breaks.