Attempt at portraying a migraine.
But then how do you?
Each one can be different for the same person - sometimes I get visual disturbances; once while typing my spelling disintegrated; last time my speech slurred. Areas of the brain seem to temporarily shut down as blood vessels get constricted. Thankfully, my migraines last only 6 hours; some people's last - dreadfully - days.
With thanks to Samuel Rich for the face image.