Absolutely, CAN be caused by this type of tumour. I had it too, and it was UNBEARABLE when it flared up. I could go weeks without anything, and then weeks when I didn't want to eat or speak for fear of it triggering. The water from the shower set it off too. Worst pain ever. Mine was like an electric shock.
When I had surgery they told me that the tumour was heavily wrapped around my Trigeminal nerve, causing the pain.
I found medication very helpful for this. I used medication they usually prescribe for people with Trigeminal Neuralgia. Don't be surprised if your doctor doesn't think this is related to your tumour (my GP told me I probably had Trigeminal Neuralgia too, but the neurosurgeon knew it was related). I was on Tegritol (sp?) but I know there are a few other options too. It took a while to get it into my system, but it definitely helped get rid of the shocking. Unfortunately, these meds seem to come with their own set of problems (for me, double vision, headaches, dizziness). It was better than the shocking though.
Good luck. I really know how it feels, and I know there are others on the board that do too. I hope you get relief soon!
Adrienne