Do you know what it is though? I can't find anymore on it.
Honestly, it is probably a headache caused by stress. Neck tension is the A-number-1 cause of headaches.
I'm going to have to shoot down the CSF leak theory, too. I was once the caretaker of a man who suffered from cerebral palsy and part of his disease was CSF leak that caused hydrocephalus. He experienced pain so great that he could not get out of bed more often than not.
A word about googling symptoms: as gcalex and others on here constantly mention, it's not a good idea for us hypos. There are many reasons to warn against it, not least of which is the fact that these medical websites rarely if ever provide the CONTEXT in which symptoms occur. I too looked up CSF leak to find out more about it, and yes the symptoms listed sound like the garden variety headache/migraine symptoms. What is not provided is a description of just how truly AWFUL you'd feel with a CSF leak. It's not some shrinking violet problem—few REAL problems are. So keep that in mind if you're determined to keep hitting the Google crack pipe.