some few months ago, I wrote about random short head aches last perhaps just a few seconds with many every hour.
After many months of trials with corticosteroid, assuming this might be sinus related, the latest MRI shows that a year after surgery (Gamma Knife), the tumour has been pressing on the Trigeminal nerve.
As the headaches are short lived, intense and similar to ice cream head aches, a trial of Carbamazepine has just started.
Prognosis is good, in that the tumour is expected to shrink sufficiently to take the pressure back off of the nerve.
Total cases of Trigeminal Neuralgia from all causes are about 0.006% of the population p.a. So, hopefully nobody here will experience this but, in case you do, you have at least some ideas.