Hi John and welcome to this forum .....
The symptoms that go along with having an acoustic neuroma are quite varied, but as Jim said, they can include the stabbing pains you are experiencing. Some of the differences happen because it depends upon which other cranial nerves your AN is pressing besides the vestibular portion of the auditory nerve. I am not a doctor but if yours is large, it could very well be pressing on the trigeminal nerve, causing the stabbing pains.
If you notice my signature at the bottom, I had trigeminal neuralgia many years before the acoustic neuroma (on the opposite side) so I can empathize greatly with you on the awful, electric shock type pain.
To answer your question, if it is the AN pressing on the trigeminal nerve, it should be relieved when the tumor is removed.
I hope you have a neurosurgeon who is very familiar with specifically acoustic neuromas, since they are relatively rare. There are many good surgeons around the country ..... just make sure you have an experienced one.
Many thoughts and prayers ..... and let us know how you are doing, etc.
Clarice